Search for high-mass Zγ resonances in e+e−γ and μ + μ −γ final states in proton-proton collisions at \( \sqrt{s}=8 \) and 13 TeV
Received: October
resonances in e+e
The CMS collaboration 0 1
0 University , Budapest , Hungary
1 46: Also at Riga Technical University , Riga , Latvia
decaying into a Z boson and a photon. The analysis is performed using proton-proton collision data recorded with the CMS detector at the LHC at center-of-mass energies of 8 and 13 TeV, corresponding to integrated luminosities of 19.7 and 2.7 fb 1, respectively. The Z bosons are reconstructed from opposite-sign electron or muon pairs. No statistically signi cant deviation from the standard model predictions has been found in the 200{ 2000 GeV mass range. Upper limits at 95% con dence level have been derived on the product of the scalar particle production cross section and the branching fraction of the Z decaying into electrons or muons, which range from 280 to 20 fb for resonance masses
Beyond Standard Model; Hadron-Hadron scattering (experiments)
-
8 and 13 TeV
1 Introduction
2 The CMS detector
3 Particle reconstruction and event selection
4 Background modelling
5 Signal modeling
6 Systematic uncertainties
7 Results
8 Summary The CMS collaboration
The ATLAS and CMS experiments have observed [1{3] a standard model (SM) like Higgs
boson at 125 GeV [4]. While this discovery has rea rmed the SM, it is widely believed
that the SM is a low-energy approximation of a more complex theory [5]. An enhancement
with respect to the SM in the rate of rare decays of the 125 GeV boson or the discovery
of additional scalar or pseudoscalar bosons would provide evidence that this is the case.
Searches for the rare decay of the 125 GeV Higgs boson into a Z boson and a photon have
been conducted by both ATLAS and CMS [6, 7], but have insu cient sensitivity to probe
the SM Higgs boson hypothesis.
In the context of the wider search for new resonances in the diphoton nal state [8{
10], information from the Z
channel provides important complementary information. For
example, an extended SM incorporating a scalar (or pseudoscalar) decaying to two photons
would imply that Z
decays should be observed as well [11].
We present the results for a search for a high-mass scalar, X, with mass between
200 GeV and 2 TeV, decaying to Z . The analysis is performed by studying proton-proton
collisions recorded with the CMS detector at the CERN LHC. The analyzed data
samples correspond to integrated luminosities of 19.7 and 2.7 fb 1, recorded at center-of-mass
energies of 8 and 13 TeV, respectively. The search is for localized excesses in the X ! Z
channel, with the Z boson identi ed by means of its decays into an electron or a muon
pair. The dominant backgrounds consist of the irreducible contribution from the
continuum Z production and the reducible backgrounds from either nal-state radiation in Z
boson decays or Z boson production in association with one or more jets (Z plus jets),
where a jet is misidenti ed as a photon. The background is determined directly from data.
Searches for a scalar singlet decaying to Z
have been performed at the LHC by ATLAS
at center-of-mass energies of 8 [12] and 13 TeV [13].
The CMS detector
A detailed description of the CMS detector, together with the de nition of the coordinate
system used and the relevant kinematic variables, can be found elsewhere [14]. The central
feature of the CMS apparatus is a superconducting solenoid, 13 m in length and 6 m in
diameter, which provides an axial magnetic eld of 3.8 T. Within the eld volume there are
several particle detection systems. Charged-particle trajectories are measured by silicon
pixel and strip trackers, covering 0 <
< 2 in azimuth and j j < 2:5 in pseudorapidity.
A lead tungstate crystal electromagnetic calorimeter (ECAL) is partitioned into a barrel
hadron calorimeter surrounds the ECAL volume and covers the region j j < 3. Iron
forward calorimeters with quartz bers, read out by photomultipliers, extend the calorimeter
electrons, and hadronic jets. Lead and silicon-strip preshower detectors are located in
front of the endcap electromagnetic calorimeter. Muons are identi ed and measured in
gas-ionization detectors embedded in the steel ux-return yoke outside the solenoid. The
detector is nearly hermetic, allowing energy balance measurements in the plane transverse
to the beam direction. A two-tier trigger system selects proton-proton collision events
Particle reconstruction and event selection
The selected events are required to pass a dielectron trigger, which has transverse
momentum, pT, thresholds of 17 and 12 GeV, respectively, on the two electrons, or a dimuon
trigger, with thresholds of 17 and 8 GeV on the two muons. The analysis of the 13 TeV data
also makes use of trigger paths that require the presence of only one muon, with a
transverse momentum threshold of 20 GeV. The trigger e ciencies for events containing two
leptons satisfying the subsequent event selection requirements are measured to be between
90% and 98% for the e+e
about 91% for the
enriched in Z boson events.
channel depending on the electron transverse momenta, and
channel. These e ciencies are determined with a data sample
Events with two opposite-sign, same- avor leptons (electrons or muons) and a photon
are selected. All particles are required to be isolated, and the lepton with the highest pT
is required to satisfy pT > 20 (25) GeV in the analysis of 8 (13) TeV data, while the
secondleading lepton must have pT > 10 (20) GeV. The photon is required to satisfy pT > 40 GeV.
The electrons and photon must have j j < 2:5, while the muons must have j j < 2:4.
Photons and electrons in the ECAL barrel-endcap transition region 1:44 < j j < 1:57 of
the electromagnetic calorimeter are excluded. More details on reconstruction of photons,
electrons, and muons can be found in refs. [15{17].
Events are required to have at least one vertex [18], with the reconstructed longitudinal
position within 24 cm of the geometric center of the detector and the transverse position
within 2 cm of the beam interaction region. There are multiple reconstructed vertices
associated with additional interactions (pileup), and the vertex with the highest sum of
the p2T of its associated tracks is chosen as the primary vertex. The leptons are required
to originate from the same primary vertex by requiring, for each track, that its transverse
impact parameter with respect to the primary vertex is smaller than 2 mm and that its
longitudinal impact parameter is smaller than 2 (5) mm for electrons (muons).
The observables used in the photon selection are as follows: isolation variables based
on a particle- ow (PF) algorithm [19, 20], kinematic variables corresponding to the location
and energy of the photon, shower shape variables that provide information on the size and
shape of the energy deposition in the ECAL, and a variable taking into account the energy
deposited by pileup interactions, calculated with the FastJet package [21]. Identi cation
and isolation requirements in the analysis of the 8 TeV data are enforced through the use
of a multivariate discriminant, whereas simple, cut-based selection is used in the analysis
of 13 TeV data. The search conducted in 8 TeV data targets a lower mass range, so the
photon identi cation criteria with the most e cient rejection of the jet-induced background
Photon candidates are rejected if a cluster of hits in the tracker pixel detector is found
to be compatible with the ECAL energy cluster position. The e ciency of the photon
identi cation is measured from Z ! ee data [22] by treating the electrons as photons [3],
and is found to be 90% for photons with pT > 40 GeV. These e ciencies include the losses
due to photon conversions caused by the pixel tracker veto requirement, estimated with
R =
events, where the photon is produced via
Isolation requirements are based on objects reconstructed with the PF algorithm within
2 = 0:3 from the photon candidate direction, where
are, respectively, the di erences in the pseudorapidity and azimuth angles between the
photon and the given reconstructed object. Only charged candidates are considered in the
enforcement of isolation criteria in the analysis of 13 TeV data, whereas additional photons
are also considered in the analysis of 8 TeV data.
Electron candidates are reconstructed as clusters of energy deposits in the ECAL
matched to signals in the silicon tracker [16]. The electron energy resolution is improved
by using a multivariate regression technique resulting in improvements of 10 and 30% in
the mass resolution for Z ! ee events over the standard CMS electron reconstruction in
the barrel and endcap calorimeters, respectively [16]. Electrons are identi ed via loose
requirements on the shape of these energy deposits, on the ratio of energies in associated
hadron and electromagnetic calorimeter cells, on the geometrical matching between the
energy deposits and the associated track, and on the consistency between the energy
reconstructed from the calorimeter deposits and the momentum measured in the tracker.
The electron selection criteria used in the analysis of 8 TeV data are optimized further for
background rejection using a multivariate approach. The training of the multivariate
electron reconstruction is performed using simulated events, while the performance is validated
Muon candidates [17] are reconstructed from tracks found in the muon system that are
associated with the tracks in the silicon detectors. Muon identi cation criteria are based
on the quality of the track t and the number of associated energy deposits in the pixel
and strip tracking detectors. The total e ciencies for the combined muon identi cation
and pileup-corrected isolation criteria are better than 95%.
Electrons and muons from Z boson decays are expected to be isolated from other
xed cone of size
R = 0:4 is constructed around the direction of each lepton
candidate in the search performed in 8 TeV data, while
R varies with the lepton pT in
the selection used in the analysis of 13 TeV data according to the relation:
R = < 10 GeV ; 50 < pT < 200 GeV
pT > 200 GeV:
This ensures high lepton identi cation e ciency even for highly-boosted Z boson decays,
as expected in the decay of high-mass resonances. The relative isolation of the lepton is
quanti ed by summing the transverse momenta of the relevant PF candidates within this
cone, excluding the lepton itself. To account for the contamination from pileup interactions,
charged particles originating from additional vertices are excluded from the estimate, and a
correction is applied to account for the neutral PF objects originating from pileup activity,
which cannot be excluded by vertex identi cation. The resulting quantity, divided by the
lepton transverse momentum, is required to be less than 0.4 for both electrons and muons
in the analysis of 8 TeV data, and less than 0.1 (0.2) for electrons (muons) in 13 TeV data.
This requirement rejects misidenti ed leptons and background arising from hadronic jets.
Finally, the separation between each lepton and the photon must satisfy
R > 0:4 in order
to reject events with
The invariant mass of the dilepton system is required to be greater than 50 GeV.
In the selection used in 8 TeV data, no upper dilepton mass condition is needed, while
in the selection used in 13 TeV data the dilepton mass is required to be below 130 GeV.
The minimum dilepton mass requirement rejects contributions from pp !
internal conversion of the photon produces a dilepton pair. In the rare cases where more
than one dilepton pair is present, the one with an invariant mass closest to the Z boson
mass is taken. The nal set of requirements combines the information from the photon and
the leptons: (i) the invariant mass M`` of the `+`
system (where ` = e; ), is required to
be above 150 (200) GeV in the analysis of 8 (13) TeV data; and (ii) the ratio of the photon
transverse energy to M``
must be greater than 0.27. This latter requirement suppresses
backgrounds due to misidenti cation of photons, without signi cant loss in signal sensitivity
and without introducing a bias in the M`` spectrum.
Background modelling
Simulations indicate that 80{90% of the background after the full event selection is due
production with initial-state radiation, with the remainder mostly due to the
ta 2
t
s
/σ 1
)
ift- 0
ta 2
t
s
/σ 1
)
ift- 0
(right) channels. The tted function is represented by a line, with the 68% uncertainty band
as grey shading. The lower panels show the di erence between the data and the t, divided by the
stat, that includes the statistical uncertainty in both the data and the t. For bins
with a low number of data entries, the error bars correspond to the Garwood con dence intervals.
contribution from Z plus jet events, where the jet is misreconstructed as a photon. The
M`` distributions are steeply and smoothly falling with increasing mass. The background is
measured directly in the data, through an unbinned maximum-likelihood t to the observed
distributions, separately in the e+e
parametrized with empirical formulae.
channels. The background is
In the 8 TeV analysis the background shape is parameterized with the sum of three
exponential decay functions. The
t is performed for values of M``
> 150 GeV. The
potential bias in the background measurement is studied by using pseudo-data generated
from di erent functional forms and
tted with the function under test. The results of
these ts are used to determine an appropriate model for the background, such that the
bias introduced in the signal measurement is smaller than 1/5 of the statistical uncertainty
in its determination. The chosen model (sum of three exponential decay functions) is found
to satisfy this criterion across the search mass range. The observed M`` invariant mass
spectra in 8 TeV data are shown in gure 1. The results of the t is represented by a line,
with the 68% uncertainty band as grey shading.
The 13 TeV search employs a strategy similar to the 8 TeV search. The t is performed
for values of M`` > 200 GeV. The function chosen for the background estimate,
f (x) = xa+b log x;
describes the background shape well and does not create a signi cant bias. The absence
of signi cant bias has been veri ed by tting a large number of pseudo-datasets generated
from various background models, and measuring the di erence between the true and tted
background yields in di erent M`` windows; in each window a pull variable is de ned as
tta 2
s
)
ift- 0
ta−1
tta 2
s
/σ 1
)
ift- 0
ta−1
(right) channels. The tted function is represented by a line, with the 68% uncertainty band
as gray shading. The lower panels show the di erence between the data and the t, divided by the
uncertainty stat, which includes the statistical uncertainty in both the data and the t. For bins
with a low number of data entries, the error bars correspond to the Garwood con dence intervals.
shown with a line and a band.
Signal modeling
the di erence between the true and tted yields, divided by the statistical uncertainty. If
the absolute value of the median of this distribution is found to be above 0.5 in an interval,
an additional uncertainty is assigned to the background parametrization. A modi ed pull
distribution is then constructed, increasing the statistical uncertainty in the t by an extra
term, denoted the bias term. The bias term is parametrized as a smooth function of M`` ,
which is tuned in such a manner that the absolute value of the median of the modi ed
pull distribution is less than 0.5 in all intervals. This additional uncertainty is included
in the likelihood function by adding to the background model a component having the
same shape as the signal, with a normalization coe cient distributed as a Gaussian of
mean zero, and with a width equal to the integral of the bias term. This inclusion of
the additional component takes into account the possible mismodeling of the background
shape. The bias term which is used in this analysis amounts to about 5
10 3 events/GeV
The observed M`` invariant mass spectra in 13 TeV data are shown in
(right) channels. The results of the t and its uncertainty are
No events with invariant mass larger than 1275 (1220) GeV pass the selection on
We focus on narrow-width signal models, where the intrinsic width of the resonance is
negligible compared to the experimental resolution. Scalar resonances decaying to Z are
generated at leading order with pythia 8.175 [23] and NNPDF2.3 [24] parton distribution
functions (PDF). The 8 TeV generator uses the Z2* tune [25] to describe the underlying
event and the 13 TeV generator, the CUETP8M tune [26]. Several samples are generated
with masses ranging from 200 (350) GeV to 1.2 (2) TeV, in the 8 (13) TeV analysis. The
search performed in 13 TeV data begins at higher invariant mass in order to avoid the
region where the background is sculpted by the kinematic selections imposed on the
nalstate objects. As far as the upper range, the analysis of the 8 TeV data ends where the
results based on the 13 TeV analysis dominate the combination.
The signal distribution in M`` is obtained from the generated events that pass the full
selection. The signal shape is parametrized with empirical functions; the function chosen
is the sum of a Gaussian and Crystal Ball function ([27], see appendix D) for the 8 TeV
analysis, and an extended form of the Crystal Ball function, with a Gaussian core and two
power-law tails, for the 13 TeV analysis. The tted parameters are determined from the
simulated samples at each mass point, separately for the electron and muon channels, and
then interpolated through polynomial ts to generic M`` values in order to have smoothly
varying signal shape parametrizations. The typical mass resolution for signal events is
channel and 1{2% for the
channel, depending on the mass of
The product of the expected signal acceptance and e ciency in the analysis of 8 TeV
data rises from about 33% at M``
= 200 GeV to about 45% at M``
= 1:2 TeV. In
45% (55%) at M`` = 2 TeV, for the e+e
Systematic uncertainties
The background spectra are described by parametric functions of M`` . The coe cients are
obtained from a t to the data events, and considered as unconstrained nuisance parameters
in the t. Thus the description of the background is derived from data. No systematic
uncertainty related to the background description is considered, as possible biases are
accounted for in the bias terms.
The systematic uncertainty in the signal description arises from the integrated
luminosity measurement [28, 29], the trigger e ciency, the e ect on the signal acceptance from
the choice of parton distribution functions [30], the imperfect simulation of the lepton and
photon e ciencies, and the signal mass scale and resolution. These uncertainties have
been evaluated separately at 8 and 13 TeV, and their magnitudes are summarized in
table 1. The photon e ciency uncertainty of the 13 TeV data analysis is larger because of the
use of preliminary calibrations. The sources of uncertainty are considered to be completely
uncorrelated between the two center-of-mass energies.
No signi cant excess is observed with respect to the SM background predictions. Upper
limits are set on the production cross section of high-mass scalar resonances using the
Trigger e ciency (ee,
Lepton e ciency
Photon e ciency
Mass scale and resolution (ee ,
Total systematic uncertainty (ee ,
fraction for X ! Z obtained with the searches performed at 8 TeV (left) and at 13 TeV (right).
modi ed frequentist method, commonly known as CLs [31, 32]. An example of its usage is
found in [2]. Asymptotic formulae [33] are used in the calculation. The individual expected
and observed upper limits at 95% con dence level (CL) on the product of the cross section
and the branching fraction for X ! Z are shown in
The combination of the two results accounts for the di erent parton luminosities for
collisions at 8 and 13 TeV, which have been calculated with the NNPDF2.3 parton
distributions [24]. The e ect of using di erent PDFs for the scaling has been evaluated and
a ects the limits by at most a few percent, mainly in the low-mass region. The signal is
assumed to be produced solely through gluon-gluon fusion, and the 8 TeV limit is scaled
up by the corresponding parton luminosity ratio, which ranges between 3 and 7 in the 0.2
to 1.2 TeV mass region, and is about 4.3 for a signal with a mass of 750 GeV.
Figure 4 (left) shows the 95% CL upper limits on the 13 TeV cross section, 13 TeV(X !
Z ), as a function of the resonance mass, for the 8 TeV (blue, lighter) and 13 TeV (red,
darker) analyses, and their combination (black). The expected (observed) limits are shown
as dashed (solid) lines. Figure 4 (right) shows the combined 8 and 13 TeV limit with its
68% (inner green) and 95% (outer yellow) uncertainty bands. The discontinuities in the
limits are an artifact of the di erent ranges exploited by the two searches.
19.7 fb-1 (8 TeV) + 2.7 fb-1 (13 TeV)
8 TeV Expected
8 TeV Observed
13 TeV(X ! Z ) for the scaled 8 TeV (blue, lighter) and 13 TeV (red, darker) searches, together
with their combination (black). Expected limits are shown with dashed lines, observed ones with
Right: 95% CL upper limit for the combination of 8 TeV and 13 TeV data.
The solid (dashed) line represents the observed (expected) limit, whereas the inner green (outer yellow) bands represent the 68% (95%) uncertainty bands.
19.7 fb-1 (8 TeV) + 2.7 fb-1 (13 TeV)
l
ca10−1
o
10−2
10−3
8 TeV 13 TeV Combination
Resonance Mass [GeV]
13 TeV search (red, dashed), and the combination (black, solid).
Background-only local p-values are de ned as the probability of obtaining, under the
background-only hypothesis, a result equal or larger than the one observed in the data.
Figure 5 shows the observed background-only p-values for the 8 TeV search (blue, dotted),
the 13 TeV search (red, dashed), and their combination (black). The uctuation at M``
370 GeV corresponds to a local signi cance of 2.6 , and a global signi cance smaller than
one standard deviation, once the `look-elsewhere' e ect has been taken into account [34].
This has been computed by counting the fraction of times the background-only p-value
crosses the level corresponding to 0.5 standard deviations in the full mass range in which
, has been presented. The search makes use of proton-proton data collected by the CMS
detector at the LHC, corresponding to integrated luminosities of 19.7 and 2.7 fb 1 at 8 and
13 TeV, respectively. The background is measured directly from data and localized excesses
are looked for. No signi cant deviation with respect to the standard model expectation
is found. Upper limits at 95% con dence level are set on the production cross section of
narrow resonances, ranging from 280 to 20 fb for resonance masses from 200 to 2000 GeV.
We congratulate our colleagues in the CERN accelerator departments for the excellent
performance of the LHC and thank the technical and administrative sta s at CERN and
at other CMS institutes for their contributions to the success of the CMS e ort. In
addition, we gratefully acknowledge the computing centers and personnel of the Worldwide
LHC Computing Grid for delivering so e ectively the computing infrastructure essential
to our analyses. Finally, we acknowledge the enduring support for the construction and
operation of the LHC and the CMS detector provided by the following funding agencies:
BMWFW and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ,
and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China);
COLCIENCIAS (Colombia); MSES and CSF (Croatia); RPF (Cyprus); SENESCYT (Ecuador);
MoER, ERC IUT and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland);
CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece);
OTKA and NIH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN
(Italy); MSIP and NRF (Republic of Korea); LAS (Lithuania); MOE and UM (Malaysia);
BUAP, CINVESTAV, CONACYT, LNS, SEP, and UASLP-FAI (Mexico); MBIE (New
Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna);
MON, RosAtom, RAS and RFBR (Russia); MESTD (Serbia); SEIDI and CPAN (Spain);
Swiss Funding Agencies (Switzerland); MST (Taipei); ThEPCenter, IPST, STAR and
NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU and SFFR (Ukraine); STFC
(United Kingdom); DOE and NSF (U.S.A.).
Individuals have received support from the Marie-Curie program and the European
Research Council and EPLANET (European Union); the Leventis Foundation; the A.
P. Sloan Foundation; the Alexander von Humboldt Foundation; the Belgian Federal
Sci
ce; the Fonds pour la Formation a la Recherche dans l'Industrie et dans
l'Agriculture (FRIA-Belgium); the Agentschap voor Innovatie door Wetenschap en
Technologie (IWT-Belgium); the Ministry of Education, Youth and Sports (MEYS) of the Czech
Republic; the Council of Science and Industrial Research, India; the HOMING PLUS
program of the Foundation for Polish Science, co nanced from European Union, Regional
Development Fund, the Mobility Plus program of the Ministry of Science and Higher
Education, the National Science Center (Poland), contracts Harmonia 2014/14/M/ST2/00428,
Opus 2013/11/B/ST2/04202, 2014/13/B/ST2/02543 and 2014/15/B/ST2/03998,
Sonatabis 2012/07/E/ST2/01406; the Thalis and Aristeia programs co nanced by EU-ESF and
the Greek NSRF; the National Priorities Research Program by Qatar National Research
Fund; the Programa Clar n-COFUND del Principado de Asturias; the Rachadapisek
Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University and the Chulalongkorn
Academic into Its 2nd Century Project Advancement Project (Thailand); and the Welch
Foundation, contract C-1845.
This article is distributed under the terms of the Creative Commons
Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in
any medium, provided the original author(s) and source are credited.
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Institute for Nuclear Problems, Minsk, Belarus
O. Dvornikov, V. Makarenko, V. Zykunov
National Centre for Particle and High Energy Physics, Minsk, Belarus
V. Mossolov, N. Shumeiko, J. Suarez Gonzalez
Universiteit Antwerpen, Antwerpen, Belgium
S. Alderweireldt, E.A. De Wolf, X. Janssen, J. Lauwers, M. Van De Klundert, H. Van
Haevermaet, P. Van Mechelen, N. Van Remortel, A. Van Spilbeeck
Vrije Universiteit Brussel, Brussel, Belgium
S. Abu Zeid, F. Blekman, J. D'Hondt, N. Daci, I. De Bruyn, K. Deroover, N. Heracleous,
S. Lowette, S. Moortgat, L. Moreels, A. Olbrechts, Q. Python, S. Tavernier, W. Van
Doninck, P. Van Mulders, I. Van Parijs
Universite Libre de Bruxelles, Bruxelles, Belgium
H. Brun, B. Clerbaux, G. De Lentdecker, H. Delannoy, G. Fasanella, L. Favart,
R. Goldouzian, A. Grebenyuk, G. Karapostoli, T. Lenzi, A. Leonard, J. Luetic, T.
Maerschalk, A. Marinov, A. Randle-conde, T. Seva, C. Vander Velde, P. Vanlaer, R. Yonamine,
F. Zenoni, F. Zhang2
Ghent University, Ghent, Belgium
A. Cimmino, T. Cornelis, D. Dobur, A. Fagot, G. Garcia, M. Gul, D. Poyraz, S. Salva,
R. Schofbeck, A. Sharma, M. Tytgat, W. Van Driessche, E. Yazgan, N. Zaganidis
Universite Catholique de Louvain, Louvain-la-Neuve, Belgium
H. Bakhshiansohi, C. Belu 3, O. Bondu, S. Brochet, G. Bruno, A. Caudron, S. De
Visscher, C. Delaere, M. Delcourt, B. Francois, A. Giammanco, A. Jafari, P. Jez,
M. Komm, V. Lemaitre, A. Magitteri, A. Mertens, M. Musich, C. Nuttens, K. Piotrzkowski,
L. Quertenmont, M. Selvaggi, M. Vidal Marono, S. Wertz
Universite de Mons, Mons, Belgium
Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil
W.L. Alda Junior, F.L. Alves, G.A. Alves, L. Brito, C. Hensel, A. Moraes, M.E. Pol,
Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
E. Belchior Batista Das Chagas, W. Carvalho, J. Chinellato4, A. Custodio, E.M. Da Costa,
G.G. Da Silveira5, D. De Jesus Damiao, C. De Oliveira Martins, S. Fonseca De Souza,
L.M. Huertas Guativa, H. Malbouisson, D. Matos Figueiredo, C. Mora Herrera, L. Mundim,
H. Nogima, W.L. Prado Da Silva, A. Santoro, A. Sznajder, E.J. Tonelli Manganote4,
Universidade Estadual Paulista a, Universidade Federal do ABC b, S~ao Paulo,
S. Ahujaa, C.A. Bernardesb, S. Dograa, T.R. Fernandez Perez Tomeia, E.M. Gregoresb,
P.G. Mercadanteb, C.S. Moona, S.F. Novaesa, Sandra S. Padulaa, D. Romero Abadb,
Institute for Nuclear Research and Nuclear Energy, So a, Bulgaria
A. Aleksandrov, R. Hadjiiska, P. Iaydjiev, M. Rodozov, S. Stoykova, G. Sultanov, M.
VuUniversity of So a, So a, Bulgaria
A. Dimitrov, I. Glushkov, L. Litov, B. Pavlov, P. Petkov
Beihang University, Beijing, China
H. Zhang, J. Zhao
Institute of High Energy Physics, Beijing, China
M. Ahmad, J.G. Bian, G.M. Chen, H.S. Chen, M. Chen, Y. Chen7, T. Cheng, C.H. Jiang,
D. Leggat, Z. Liu, F. Romeo, S.M. Shaheen, A. Spiezia, J. Tao, C. Wang, Z. Wang,
State Key Laboratory of Nuclear Physics and Technology, Peking University,
Y. Ban, G. Chen, Q. Li, S. Liu, Y. Mao, S.J. Qian, D. Wang, Z. Xu
Universidad de Los Andes, Bogota, Colombia
C. Avila, A. Cabrera, L.F. Chaparro Sierra, C. Florez, J.P. Gomez, C.F. Gonzalez
Hernandez, J.D. Ruiz Alvarez, J.C. Sanabria
University of Split, Faculty of Electrical Engineering, Mechanical Engineering
and Naval Architecture, Split, Croatia
N. Godinovic, D. Lelas, I. Puljak, P.M. Ribeiro Cipriano, T. Sculac
University of Split, Faculty of Science, Split, Croatia
Z. Antunovic, M. Kovac
Institute Rudjer Boskovic, Zagreb, Croatia
V. Brigljevic, D. Ferencek, K. Kadija, S. Micanovic, L. Sudic, T. Susa
University of Cyprus, Nicosia, Cyprus
A. Attikis, G. Mavromanolakis, J. Mousa, C. Nicolaou, F. Ptochos, P.A. Razis,
H. Rykaczewski, D. Tsiakkouri
Charles University, Prague, Czech Republic
M. Finger8, M. Finger Jr.8
Universidad San Francisco de Quito, Quito, Ecuador
E. Carrera Jarrin
Academy of Scienti c Research and Technology of the Arab Republic of Egypt,
Egyptian Network of High Energy Physics, Cairo, Egypt
E. El-khateeb9, S. Elgammal10, A. Mohamed11
National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
B. Calpas, M. Kadastik, M. Murumaa, L. Perrini, M. Raidal, A. Tiko, C. Veelken
Department of Physics, University of Helsinki, Helsinki, Finland
P. Eerola, J. Pekkanen, M. Voutilainen
Helsinki Institute of Physics, Helsinki, Finland
J. Harkonen, T. Jarvinen, V. Karimaki, R. Kinnunen, T. Lampen, K. Lassila-Perini,
S. Lehti, T. Linden, P. Luukka, J. Tuominiemi, E. Tuovinen, L. Wendland
Lappeenranta University of Technology, Lappeenranta, Finland
J. Talvitie, T. Tuuva
IRFU, CEA, Universite Paris-Saclay, Gif-sur-Yvette, France
M. Besancon, F. Couderc, M. Dejardin, D. Denegri, B. Fabbro, J.L. Faure, C. Favaro,
F. Ferri, S. Ganjour, S. Ghosh, A. Givernaud, P. Gras, G. Hamel de Monchenault, P. Jarry,
I. Kucher, E. Locci, M. Machet, J. Malcles, J. Rander, A. Rosowsky, M. Titov, A. Zghiche
Laboratoire Leprince-Ringuet, Ecole Polytechnique, IN2P3-CNRS, Palaiseau,
A. Abdulsalam, I. Antropov, S. Ba oni, F. Beaudette, P. Busson, L. Cadamuro,
E. Chapon, C. Charlot, O. Davignon, R. Granier de Cassagnac, M. Jo, S. Lisniak, P. Mine,
M. Nguyen, C. Ochando, G. Ortona, P. Paganini, P. Pigard, S. Regnard, R. Salerno,
Y. Sirois, T. Strebler, Y. Yilmaz, A. Zabi
Institut Pluridisciplinaire Hubert Curien, Universite de Strasbourg,
Universite de Haute Alsace Mulhouse, CNRS/IN2P3, Strasbourg, France
J.-L. Agram12, J. Andrea, A. Aubin, D. Bloch, J.-M. Brom, M. Buttignol, E.C. Chabert,
N. Chanon, C. Collard, E. Conte12, X. Coubez, J.-C. Fontaine12, D. Gele, U. Goerlach,
A.-C. Le Bihan, K. Skovpen, P. Van Hove
Centre de Calcul de l'Institut National de Physique Nucleaire et de Physique
des Particules, CNRS/IN2P3, Villeurbanne, France
Universite de Lyon, Universite Claude Bernard Lyon 1, CNRS-IN2P3, Institut
de Physique Nucleaire de Lyon, Villeurbanne, France
S. Beauceron, C. Bernet, G. Boudoul, E. Bouvier, C.A. Carrillo Montoya, R. Chierici,
D. Contardo, B. Courbon, P. Depasse, H. El Mamouni, J. Fan, J. Fay, S. Gascon,
A.L. Pequegnot, S. Perries, A. Popov13, D. Sabes, V. Sordini, M. Vander Donckt, P. Verdier,
A. Khvedelidze8
Georgian Technical University, Tbilisi, Georgia
Tbilisi State University, Tbilisi, Georgia
Z. Tsamalaidze8
RWTH Aachen University, I. Physikalisches Institut, Aachen, Germany
C. Autermann, S. Beranek, L. Feld, A. Heister, M.K. Kiesel, K. Klein, M. Lipinski,
A. Ostapchuk, M. Preuten, F. Raupach, S. Schael, C. Schomakers, J. Schulz, T. Verlage,
H. Weber, V. Zhukov13
RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
A. Albert, M. Brodski, E. Dietz-Laursonn, D. Duchardt, M. Endres, M. Erdmann, S.
Erdweg, T. Esch, R. Fischer, A. Guth, M. Hamer, T. Hebbeker, C. Heidemann, K. Hoepfner,
S. Knutzen, M. Merschmeyer, A. Meyer, P. Millet, S. Mukherjee, M. Olschewski,
K. Padeken, T. Pook, M. Radziej, H. Reithler, M. Rieger, F. Scheuch, L. Sonnenschein,
RWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany
V. Cherepanov, G. Flugge, F. Hoehle, B. Kargoll, T. Kress, A. Kunsken, J. Lingemann,
T. Muller, A. Nehrkorn, A. Nowack, I.M. Nugent, C. Pistone, O. Pooth, A. Stahl14
Deutsches Elektronen-Synchrotron, Hamburg, Germany
M. Aldaya Martin, T. Arndt, C. Asawatangtrakuldee, K. Beernaert, O. Behnke,
U. Behrens, A.A. Bin Anuar, K. Borras15, A. Campbell, P. Connor, C. Contreras-Campana,
F. Costanza, C. Diez Pardos, G. Dolinska, G. Eckerlin, D. Eckstein, T. Eichhorn, E. Eren,
E. Gallo16, J. Garay Garcia, A. Geiser, A. Gizhko, J.M. Grados Luyando, P. Gunnellini,
A. Harb, J. Hauk, M. Hempel17, H. Jung, A. Kalogeropoulos, O. Karacheban17, M. Kase
mann, J. Keaveney, C. Kleinwort, I. Korol, D. Krucker, W. Lange, A. Lelek, J. Leonard,
K. Lipka, A. Lobanov, W. Lohmann17, R. Mankel, I.-A. Melzer-Pellmann, A.B. Meyer,
G. Mittag, J. Mnich, A. Mussgiller, E. Ntomari, D. Pitzl, R. Placakyte, A. Raspereza,
B. Roland, M.O . Sahin, P. Saxena, T. Schoerner-Sadenius, C. Seitz, S. Spannagel,
N. Stefaniuk, G.P. Van Onsem, R. Walsh, C. Wissing
University of Hamburg, Hamburg, Germany
V. Blobel, M. Centis Vignali, A.R. Draeger, T. Dreyer, E. Garutti, D. Gonzalez, J. Haller,
M. Ho mann, A. Junkes, R. Klanner, R. Kogler, N. Kovalchuk, T. Lapsien, T. Lenz,
I. Marchesini, D. Marconi, M. Meyer, M. Niedziela, D. Nowatschin, F. Pantaleo14,
T. Pei er, A. Perieanu, J. Poehlsen, C. Sander, C. Scharf, P. Schleper, A. Schmidt,
S. Schumann, J. Schwandt, H. Stadie, G. Steinbruck, F.M. Stober, M. Stover, H. Tholen,
D. Troendle, E. Usai, L. Vanelderen, A. Vanhoefer, B. Vormwald
Institut fur Experimentelle Kernphysik, Karlsruhe, Germany
C. Barth, C. Baus, J. Berger, E. Butz, T. Chwalek, F. Colombo, W. De Boer, A. Dierlamm,
S. Fink, R. Friese, M. Gi els, A. Gilbert, P. Goldenzweig, D. Haitz, F. Hartmann14,
S.M. Heindl, U. Husemann, I. Katkov13, P. Lobelle Pardo, B. Maier, H. Mildner,
M.U. Mozer, Th. Muller, M. Plagge, G. Quast, K. Rabbertz, S. Rocker, F. Roscher,
Institute of Nuclear and Particle Physics (INPP), NCSR Demokritos, Aghia
I. Topsis-Giotis G. Anagnostou, G. Daskalakis, T. Geralis, V.A. Giakoumopoulou, A. Kyriakis, D. Loukas, National and Kapodistrian University of Athens, Athens, Greece S. Kesisoglou, A. Panagiotou, N. Saoulidou, E. Tziaferi
University of Ioannina, Ioannina, Greece
I. Evangelou, G. Flouris, C. Foudas, P. Kokkas, N. Loukas, N. Manthos, I. Papadopoulos,
MTA-ELTE Lendulet CMS Particle and Nuclear Physics Group, Eotvos Lorand
Wigner Research Centre for Physics, Budapest, Hungary
G. Bencze, C. Hajdu, P. Hidas, D. Horvath18, F. Sikler, V. Veszpremi, G. Vesztergombi19,
Institute of Nuclear Research ATOMKI, Debrecen, Hungary
N. Beni, S. Czellar, J. Karancsi20, A. Makovec, J. Molnar, Z. Szillasi
University of Debrecen, Debrecen, Hungary
M. Bartok19, P. Raics, Z.L. Trocsanyi, B. Ujvari
National Institute of Science Education and Research, Bhubaneswar, India
S. Bahinipati, S. Choudhury21, P. Mal, K. Mandal, A. Nayak22, D.K. Sahoo, N. Sahoo,
Panjab University, Chandigarh, India
S. Bansal, S.B. Beri, V. Bhatnagar, R. Chawla, U.Bhawandeep, A.K. Kalsi, A. Kaur,
M. Kaur, R. Kumar, P. Kumari, A. Mehta, M. Mittal, J.B. Singh, G. Walia
University of Delhi, Delhi, India
Ashok Kumar, A. Bhardwaj, B.C. Choudhary, R.B. Garg, S. Keshri, S. Malhotra,
M. Naimuddin, N. Nishu, K. Ranjan, R. Sharma, V. Sharma
Saha Institute of Nuclear Physics, Kolkata, India
R. Bhattacharya, S. Bhattacharya, K. Chatterjee, S. Dey, S. Dutt, S. Dutta, S. Ghosh,
N. Majumdar, A. Modak, K. Mondal, S. Mukhopadhyay, S. Nandan, A. Purohit, A. Roy,
D. Roy, S. Roy Chowdhury, S. Sarkar, M. Sharan, S. Thakur
Indian Institute of Technology Madras, Madras, India
Bhabha Atomic Research Centre, Mumbai, India
R. Chudasama, D. Dutta, V. Jha, V. Kumar, A.K. Mohanty14, P.K. Netrakanti, L.M. Pant,
P. Shukla, A. Topkar
B. Sutar
Tata Institute of Fundamental Research-A, Mumbai, India
T. Aziz, S. Dugad, G. Kole, B. Mahakud, S. Mitra, G.B. Mohanty, B. Parida, N. Sur,
Tata Institute of Fundamental Research-B, Mumbai, India
S. Banerjee, S. Bhowmik23, R.K. Dewanjee, S. Ganguly, M. Guchait, Sa. Jain, S. Kumar,
M. Maity23, G. Majumder, K. Mazumdar, T. Sarkar23, N. Wickramage24
Indian Institute of Science Education and Research (IISER), Pune, India
S. Chauhan, S. Dube, V. Hegde, A. Kapoor, K. Kothekar, A. Rane, S. Sharma
Institute for Research in Fundamental Sciences (IPM), Tehran, Iran
H. Behnamian, S. Chenarani25, E. Eskandari Tadavani, S.M. Etesami25, A. Fahim26,
M. Khakzad, M. Mohammadi Najafabadi, M. Naseri, S. Paktinat Mehdiabadi27, F. Rezaei
Hosseinabadi, B. Safarzadeh28, M. Zeinali
University College Dublin, Dublin, Ireland
M. Felcini, M. Grunewald
INFN Sezione di Bari a, Universita di Bari b, Politecnico di Bari c, Bari, Italy
M. Abbresciaa;b, C. Calabriaa;b, C. Caputoa;b, A. Colaleoa, D. Creanzaa;c, L. Cristellaa;b,
N. De Filippisa;c, M. De Palmaa;b, L. Fiorea, G. Iasellia;c, G. Maggia;c, M. Maggia,
G. Minielloa;b, S. Mya;b, S. Nuzzoa;b, A. Pompilia;b, G. Pugliesea;c, R. Radognaa;b,
A. Ranieria, G. Selvaggia;b, L. Silvestrisa;14, R. Vendittia;b, P. Verwilligena
INFN Sezione di Bologna a, Universita di Bologna b, Bologna, Italy
G. Abbiendia, C. Battilana, D. Bonacorsia;b, S. Braibant-Giacomellia;b, L. Brigliadoria;b,
R. Campaninia;b, P. Capiluppia;b,
A. Castroa;b, F.R. Cavalloa,
S.S. Chhibraa;b,
G. Codispotia;b, M. Cu ania;b, G.M. Dallavallea, F. Fabbria, A. Fanfania;b, D. Fasanellaa;b,
P. Giacomellia, C. Grandia, L. Guiduccia;b, S. Marcellinia, G. Masettia, A. Montanaria,
F.L. Navarriaa;b, A. Perrottaa, A.M. Rossia;b, T. Rovellia;b, G.P. Sirolia;b, N. Tosia;b;14
INFN Sezione di Catania a, Universita di Catania b, Catania, Italy
S. Albergoa;b, M. Chiorbolia;b, S. Costaa;b, A. Di Mattiaa, F. Giordanoa;b, R. Potenzaa;b,
A. Tricomia;b, C. Tuvea;b
INFN Sezione di Firenze a, Universita di Firenze b, Firenze, Italy
G. Barbaglia, V. Ciullia;b, C. Civininia, R. D'Alessandroa;b, E. Focardia;b, V. Goria;b,
P. Lenzia;b, M. Meschinia, S. Paolettia, G. Sguazzonia, L. Viliania;b;14
INFN Laboratori Nazionali di Frascati, Frascati, Italy
L. Benussi, S. Bianco, F. Fabbri, D. Piccolo, F. Primavera14
INFN Sezione di Genova a, Universita di Genova b, Genova, Italy
V. Calvellia;b, F. Ferroa, M. Lo Veterea;b, M.R. Mongea;b, E. Robuttia, S. Tosia;b
INFN Sezione di Milano-Bicocca a, Universita di Milano-Bicocca b, Milano,
INFN Sezione di Napoli a, Universita di Napoli 'Federico II' b, Napoli, Italy,
Universita della Basilicata c, Potenza, Italy, Universita G. Marconi d, Roma,
S. Buontempoa, N. Cavalloa;c, G. De Nardo, S. Di Guidaa;d;14, M. Espositoa;b,
F. Fabozzia;c, F. Fiengaa;b, A.O.M. Iorioa;b, G. Lanzaa, L. Listaa, S. Meolaa;d;14,
P. Paoluccia;14, C. Sciaccaa;b, F. Thyssen
INFN Sezione di Padova a, Universita di Padova b, Padova, Italy, Universita di
Trento c, Trento, Italy
P. Azzia;14, N. Bacchettaa, L. Benatoa;b, A. Bolettia;b, R. Carlina;b, P. Checchiaa,
M. Dall'Ossoa;b, P. De Castro
Manzanoa, T. Dorigoa, U. Dossellia, S. Fantinela,
F. Gasparinia;b,
U. Gasparinia;b,
A. Gozzelinoa, S. Lacapraraa, M. Margonia;b,
A.T. Meneguzzoa;b, F. Montecassianoa, J. Pazzinia;b, N. Pozzobona;b, P. Ronchesea;b,
F. Simonettoa;b, E. Torassaa, M. Zanetti, P. Zottoa;b, G. Zumerlea;b
INFN Sezione di Pavia a, Universita di Pavia b, Pavia, Italy
A. Braghieria, A. Magnania;b, P. Montagnaa;b, S.P. Rattia;b, V. Rea, C. Riccardia;b,
P. Salvinia, I. Vaia;b, P. Vituloa;b
INFN Sezione di Perugia a, Universita di Perugia b, Perugia, Italy
L. Alunni Solestizia;b, G.M. Bileia, D. Ciangottinia;b, L. Fanoa;b, P. Laricciaa;b,
R. Leonardia;b, G. Mantovania;b, M. Menichellia, A. Sahaa, A. Santocchiaa;b
INFN Sezione di Pisa a, Universita di Pisa b, Scuola Normale Superiore di
Pisa c, Pisa, Italy
K. Androsova;29, P. Azzurria;14, G. Bagliesia, J. Bernardinia, T. Boccalia, R. Castaldia,
M.A. Cioccia;29, R. Dell'Orsoa, S. Donatoa;c, G. Fedi, A. Giassia, M.T. Grippoa;29,
F. Ligabuea;c, T. Lomtadzea, L. Martinia;b, A. Messineoa;b, F. Pallaa, A. Rizzia;b, A.
SavoyNavarroa;30, P. Spagnoloa, R. Tenchinia, G. Tonellia;b, A. Venturia, P.G. Verdinia
INFN Sezione di Roma a, Universita di Roma b, Roma, Italy
S. Gellia;b, E. Longoa;b, F. Margarolia;b, B. Marzocchia;b, P. Meridiania, G. Organtinia;b,
R. Paramattia, F. Preiatoa;b, S. Rahatloua;b, C. Rovellia, F. Santanastasioa;b
INFN Sezione di Torino a, Universita di Torino b, Torino, Italy, Universita del
Piemonte Orientale c, Novara, Italy
N. Amapanea;b, R. Arcidiaconoa;c;14, S. Argiroa;b, M. Arneodoa;c, N. Bartosika,
R. Bellana;b, C. Biinoa, N. Cartigliaa, F. Cennaa;b, M. Costaa;b, R. Covarellia;b,
A. Deganoa;b, N. Demariaa, L. Fincoa;b, B. Kiania;b, C. Mariottia, S. Masellia,
E. Migliorea;b, V. Monacoa;b, E. Monteila;b, M.M. Obertinoa;b, L. Pachera;b, N. Pastronea,
M. Pelliccionia, G.L. Pinna Angionia;b, F. Raveraa;b, A. Romeroa;b, M. Ruspaa;c,
R. Sacchia;b, K. Shchelinaa;b, V. Solaa, A. Solanoa;b, A. Staianoa, P. Traczyka;b
INFN Sezione di Trieste a, Universita di Trieste b, Trieste, Italy
S. Belfortea, M. Casarsaa, F. Cossuttia, G. Della Riccaa;b, A. Zanettia
Kyungpook National University, Daegu, Korea
D.H. Kim, G.N. Kim, M.S. Kim, S. Lee, S.W. Lee, Y.D. Oh, S. Sekmen, D.C. Son,
A. Lee
Chonbuk National University, Jeonju, Korea
Chonnam National University, Institute for Universe and Elementary Particles,
Hanyang University, Seoul, Korea
J.A. Brochero Cifuentes, T.J. Kim
Korea University, Seoul, Korea
S. Lee, J. Lim, S.K. Park, Y. Roh
Seoul National University, Seoul, Korea
U.K. Yang, H.D. Yoo, G.B. Yu
University of Seoul, Seoul, Korea
M. Choi, H. Kim, J.H. Kim, J.S.H. Lee, I.C. Park, G. Ryu, M.S. Ryu
Sungkyunkwan University, Suwon, Korea
Y. Choi, J. Goh, C. Hwang, J. Lee, I. Yu
Vilnius University, Vilnius, Lithuania
V. Dudenas, A. Juodagalvis, J. Vaitkus S. Cho, S. Choi, Y. Go, D. Gyun, S. Ha, B. Hong, Y. Jo, Y. Kim, B. Lee, K. Lee, K.S. Lee, J. Almond, J. Kim, H. Lee, K. Lee, K. Nam, S.B. Oh, B.C. Radburn-Smith, S.h. Seo, { 21 {
National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur,
Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico
H. Castilla-Valdez, E. De La Cruz-Burelo, I. Heredia-De La Cruz33, A. Hernandez-Almada,
R. Lopez-Fernandez, R. Magan~a Villalba, J. Mejia Guisao, A. Sanchez-Hernandez
Universidad Iberoamericana, Mexico City, Mexico
S. Carrillo Moreno, C. Oropeza Barrera, F. Vazquez Valencia
Benemerita Universidad Autonoma de Puebla, Puebla, Mexico
S. Carpinteyro, I. Pedraza, H.A. Salazar Ibarguen, C. Uribe Estrada
Universidad Autonoma de San Luis Potos , San Luis Potos , Mexico
A. Morelos Pineda
University of Auckland, Auckland, New Zealand
University of Canterbury, Christchurch, New Zealand
National Centre for Physics, Quaid-I-Azam University, Islamabad, Pakistan
A. Ahmad, M. Ahmad, Q. Hassan, H.R. Hoorani, W.A. Khan, A. Saddique, M.A. Shah,
M. Shoaib, M. Waqas
National Centre for Nuclear Research, Swierk, Poland
H. Bialkowska, M. Bluj, B. Boimska, T. Frueboes, M. Gorski, M. Kazana, K. Nawrocki,
K. Romanowska-Rybinska, M. Szleper, P. Zalewski
Institute of Experimental Physics, Faculty of Physics, University of Warsaw,
K. Bunkowski, A. Byszuk34, K. Doroba, A. Kalinowski, M. Konecki, J. Krolikowski,
M. Misiura, M. Olszewski, M. Walczak
Laboratorio de Instrumentac~ao e F sica Experimental de Part culas, Lisboa,
Joint Institute for Nuclear Research, Dubna, Russia
I. Belotelov, M. Gavrilenko, I. Golutvin, I. Gorbunov, V. Karjavin, G. Kozlov, A. Lanev,
A. Malakhov, V. Matveev35;36, V. Palichik, V. Perelygin, M. Savina, S. Shmatov, S. Shulha,
N. Skatchkov, V. Smirnov, N. Voytishin, A. Zarubin
Petersburg Nuclear Physics Institute, Gatchina (St. Petersburg), Russia
L. Chtchipounov, V. Golovtsov, Y. Ivanov, V. Kim37, E. Kuznetsova38, V. Murzin,
V. Oreshkin, V. Sulimov, A. Vorobyev
Institute for Nuclear Research, Moscow, Russia
Yu. Andreev, A. Dermenev, S. Gninenko, N. Golubev, A. Karneyeu, M. Kirsanov,
N. Krasnikov, A. Pashenkov, D. Tlisov, A. Toropin
Institute for Theoretical and Experimental Physics, Moscow, Russia
V. Epshteyn, V. Gavrilov, N. Lychkovskaya, V. Popov, I. Pozdnyakov, G. Safronov,
A. Spiridonov, M. Toms, E. Vlasov, A. Zhokin
Moscow Institute of Physics and Technology
A. Bylinkin36
S. Petrushanko, V. Savrin
V. Blinov41, Y.Skovpen41
Physics, Protvino, Russia
National Research Nuclear University 'Moscow Engineering Physics
InstiM. Chadeeva39, O. Markin, E. Tarkovskii
P.N. Lebedev Physical Institute, Moscow, Russia
V. Andreev, M. Azarkin36, I. Dremin36, M. Kirakosyan, A. Leonidov36, S.V. Rusakov,
Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University,
A. Baskakov, A. Belyaev, E. Boos, V. Bunichev, M. Dubinin40, L. Dudko, A. Er
shov, A. Gribushin, V. Klyukhin, O. Kodolova, I. Lokhtin, I. Miagkov, S. Obraztsov,
Novosibirsk State University (NSU), Novosibirsk, Russia
State Research Center of Russian Federation, Institute for High Energy
I. Azhgirey, I. Bayshev, S. Bitioukov, D. Elumakhov, V. Kachanov, A. Kalinin, D.
Konstantinov, V. Krychkine, V. Petrov, R. Ryutin, A. Sobol, S. Troshin, N. Tyurin, A. Uzunian,
University of Belgrade, Faculty of Physics and Vinca Institute of Nuclear
Sciences, Belgrade, Serbia
P. Adzic42, P. Cirkovic, D. Devetak, M. Dordevic, J. Milosevic, V. Rekovic
J. Alcaraz Maestre, M. Barrio Luna, E. Calvo, M. Cerrada, M. Chamizo Llatas, N.
Colino, B. De La Cruz, A. Delgado Peris, A. Escalante Del Valle, C. Fernandez Bedoya,
J.P. Fernandez Ramos, J. Flix, M.C. Fouz, P. Garcia-Abia, O. Gonzalez Lopez, S. Goy
Lopez, J.M. Hernandez, M.I. Josa, E. Navarro De Martino, A. Perez-Calero Yzquierdo,
J. Puerta Pelayo, A. Quintario Olmeda, I. Redondo, L. Romero, M.S. Soares
Universidad Autonoma de Madrid, Madrid, Spain
J.F. de Troconiz, M. Missiroli, D. Moran
Universidad de Oviedo, Oviedo, Spain
J. Cuevas, J. Fernandez Menendez, I. Gonzalez Caballero, J.R. Gonzalez Fernandez,
E. Palencia Cortezon, S. Sanchez Cruz, I. Suarez Andres, J.M. Vizan Garcia
Instituto de F sica de Cantabria (IFCA),
CSIC-Universidad de Cantabria,
Gomez, T. Rodrigo, A. Ruiz-Jimeno, L. Scodellaro, N. Trevisani, I. Vila, R. Vilar
CERN, European Organization for Nuclear Research, Geneva, Switzerland
D. Abbaneo, E. Au ray, G. Auzinger, M. Bachtis, P. Baillon, A.H. Ball, D. Barney,
P. Bloch, A. Bocci, A. Bonato, C. Botta, T. Camporesi, R. Castello, M. Cepeda,
G. Cerminara, M. D'Alfonso, D. d'Enterria, A. Dabrowski, V. Daponte, A. David, M. De
Gruttola, A. De Roeck, E. Di Marco43, M. Dobson, B. Dorney, T. du Pree, D. Duggan,
M. Dunser, N. Dupont, A. Elliott-Peisert, S. Fartoukh, G. Franzoni, J. Fulcher, W. Funk,
D. Gigi, K. Gill, M. Girone, F. Glege, D. Gulhan, S. Gundacker, M. Gutho , J. Hammer,
P. Harris, J. Hegeman, V. Innocente, P. Janot, J. Kieseler, H. Kirschenmann, V. Knunz,
A. Kornmayer14, M.J. Kortelainen, K. Kousouris, M. Krammer1, C. Lange, P. Lecoq,
C. Lourenco, M.T. Lucchini, L. Malgeri, M. Mannelli, A. Martelli, F. Meijers, J.A. Merlin,
S. Mersi, E. Meschi, F. Moortgat, S. Morovic, M. Mulders, H. Neugebauer, S. Orfanelli,
L. Orsini, L. Pape, E. Perez, M. Peruzzi, A. Petrilli, G. Petrucciani, A. Pfei er, M. Pierini,
A. Racz, T. Reis, G. Rolandi44, M. Rovere, M. Ruan, H. Sakulin, J.B. Sauvan, C. Schafer,
C. Schwick, M. Seidel, A. Sharma, P. Silva, P. Sphicas45, J. Steggemann, M. Stoye,
Y. Takahashi, M. Tosi, D. Treille, A. Triossi, A. Tsirou, V. Veckalns46, G.I. Veres19,
N. Wardle, H.K. Wohri, A. Zagozdzinska34, W.D. Zeuner
Paul Scherrer Institut, Villigen, Switzerland
W. Bertl, K. Deiters, W. Erdmann, R. Horisberger, Q. Ingram, H.C. Kaestli, D. Kotlinski,
U. Langenegger, T. Rohe
Institute for Particle Physics, ETH Zurich, Zurich, Switzerland
F. Bachmair, L. Bani, L. Bianchini, B. Casal, G. Dissertori, M. Dittmar, M. Donega,
C. Grab, C. Heidegger, D. Hits, J. Hoss, G. Kasieczka, P. Lecomtey, W. Lustermann,
B. Mangano, M. Marionneau, P. Martinez Ruiz del Arbol, M. Masciovecchio, M.T.
Meinhard, D. Meister, F. Micheli, P. Musella, F. Nessi-Tedaldi, F. Pandol , J. Pata, F. Pauss,
G. Perrin, L. Perrozzi, M. Quittnat, M. Rossini, M. Schonenberger, A. Starodumov47,
V.R. Tavolaro, K. Theo latos, R. Wallny
Universitat Zurich, Zurich, Switzerland
T.K. Aarrestad, C. Amsler48, L. Caminada, M.F. Canelli, A. De Cosa, C. Galloni,
A. Hinzmann, T. Hreus, B. Kilminster, J. Ngadiuba, D. Pinna, G. Rauco, P. Robmann,
National Central University, Chung-Li, Taiwan
V. Candelise, T.H. Doan, Sh. Jain, R. Khurana, M. Konyushikhin, C.M. Kuo, W. Lin,
Y.J. Lu, A. Pozdnyakov, S.S. Yu
National Taiwan University (NTU), Taipei, Taiwan
Arun Kumar, P. Chang, Y.H. Chang, Y.W. Chang, Y. Chao, K.F. Chen, P.H. Chen,
A. Psallidas, J.f. Tsai, Y.M. Tzeng
Chulalongkorn University, Faculty of Science, Department of Physics, Bangkok,
B. Asavapibhop, G. Singh, N. Srimanobhas, N. Suwonjandee
Cukurova University, Adana, Turkey
A. Adiguzel, S. Cerci49, S. Damarseckin, Z.S. Demiroglu, C. Dozen, I. Dumanoglu,
S. Girgis, G. Gokbulut, Y. Guler, I. Hos, E.E. Kangal50, O. Kara, U. Kiminsu, M. Oglakci,
G. Onengut51, K. Ozdemir52, D. Sunar Cerci49, B. Tali49, H. Topakli53, S. Turkcapar,
I.S. Zorbakir, C. Zorbilmez
Middle East Technical University, Physics Department, Ankara, Turkey
B. Bilin, S. Bilmis, B. Isildak54, G. Karapinar55, M. Yalvac, M. Zeyrek
Bogazici University, Istanbul, Turkey
E. Gulmez, M. Kaya56, O. Kaya57, E.A. Yetkin58, T. Yetkin59
Istanbul Technical University, Istanbul, Turkey
A. Cakir, K. Cankocak, S. Sen60
Institute for Scintillation Materials of National Academy of Science of Ukraine,
L. Levchuk, P. Sorokin
National Scienti c Center, Kharkov Institute of Physics and Technology,
University of Bristol, Bristol, United Kingdom
R. Aggleton, F. Ball, L. Beck, J.J. Brooke, D. Burns, E. Clement, D. Cussans, H. Flacher,
J. Goldstein, M. Grimes, G.P. Heath, H.F. Heath, J. Jacob, L. Kreczko, C. Lucas,
D.M. Newbold61, S. Paramesvaran, A. Poll, T. Sakuma, S. Seif El Nasr-storey, D. Smith,
Rutherford Appleton Laboratory, Didcot, United Kingdom
K.W. Bell, A. Belyaev62, C. Brew, R.M. Brown, L. Calligaris, D. Cieri, D.J.A. Cockerill,
J.A. Coughlan, K. Harder, S. Harper, E. Olaiya, D. Petyt, C.H. Shepherd-Themistocleous,
A. Thea, I.R. Tomalin, T. Williams { 25 {
Imperial College, London, United Kingdom
M. Baber, R. Bainbridge, O. Buchmuller, A. Bundock, D. Burton, S. Casasso, M. Citron,
D. Colling, L. Corpe, P. Dauncey, G. Davies, A. De Wit, M. Della Negra, R. Di Maria,
P. Dunne, A. Elwood, D. Futyan, Y. Haddad, G. Hall, G. Iles, T. James, R. Lane,
C. Laner, R. Lucas61, L. Lyons, A.-M. Magnan, S. Malik, L. Mastrolorenzo, J. Nash,
A. Nikitenko47, J. Pela, B. Penning, M. Pesaresi, D.M. Raymond, A. Richards, A. Rose,
C. Seez, S. Summers, A. Tapper, K. Uchida, M. Vazquez Acosta63, T. Virdee14, J. Wright,
Brunel University, Uxbridge, United Kingdom
J.E. Cole, P.R. Hobson, A. Khan, P. Kyberd, D. Leslie, I.D. Reid, P. Symonds, L.
TeodorBaylor University, Waco, U.S.A.
A. Borzou, K. Call, J. Dittmann, K. Hatakeyama, H. Liu, N. Pastika
The University of Alabama, Tuscaloosa, U.S.A.
O. Charaf, S.I. Cooper, C. Henderson, P. Rumerio, C. West
Boston University, Boston, U.S.A.
Brown University, Providence, U.S.A.
G. Benelli, E. Berry, D. Cutts, A. Garabedian, J. Hakala, U. Heintz, J.M. Hogan, O. Jesus,
K.H.M. Kwok, E. Laird, G. Landsberg, Z. Mao, M. Narain, S. Piperov, S. Sagir, E. Spencer,
University of California, Davis, Davis, U.S.A.
R. Breedon, G. Breto, D. Burns, M. Calderon De La Barca Sanchez, S. Chauhan,
M. Chertok, J. Conway, R. Conway, P.T. Cox, R. Erbacher, C. Flores, G. Funk, M. Gardner,
W. Ko, R. Lander, C. Mclean, M. Mulhearn, D. Pellett, J. Pilot, S. Shalhout, J. Smith,
M. Squires, D. Stolp, M. Tripathi, S. Wilbur, R. Yohay
University of California, Los Angeles, U.S.A.
R. Cousins, P. Everaerts, A. Florent, J. Hauser, M. Ignatenko, N. Mccoll, D. Saltzberg,
E. Takasugi, V. Valuev, M. Weber
University of California, Riverside, Riverside, U.S.A.
K. Burt, R. Clare, J. Ellison, J.W. Gary, S.M.A. Ghiasi Shirazi, G. Hanson, J. Heilman,
P. Jandir, E. Kennedy, F. Lacroix, O.R. Long, M. Olmedo Negrete, M.I. Paneva, A.
Shrinivas, W. Si, H. Wei, S. Wimpenny, B. R. Yates
University of California, San Diego, La Jolla, U.S.A.
J.G. Branson, G.B. Cerati, S. Cittolin, M. Derdzinski, R. Gerosa, A. Holzner, D. Klein,
V. Krutelyov, J. Letts, I. Macneill, D. Olivito, S. Padhi, M. Pieri, M. Sani, V. Sharma,
S. Simon, M. Tadel, A. Vartak, S. Wasserbaech64, C. Welke, J. Wood, F. Wurthwein,
A. Yagil, G. Zevi Della Porta
University of California, Santa Barbara - Department of Physics, Santa
Bar
R. Bhandari, J. Bradmiller-Feld, C. Campagnari, A. Dishaw, V. Dutta, K. Flowers,
M. Franco Sevilla, P. Ge ert, C. George, F. Golf, L. Gouskos, J. Gran, R. Heller,
J. Incandela, S.D. Mullin, A. Ovcharova, J. Richman, D. Stuart, I. Suarez, J. Yoo
California Institute of Technology, Pasadena, U.S.A.
D. Anderson, A. Apresyan, J. Bendavid, A. Bornheim, J. Bunn, Y. Chen, J. Duarte,
J.M. Lawhorn, A. Mott, H.B. Newman, C. Pena, M. Spiropulu, J.R. Vlimant, S. Xie,
Carnegie Mellon University, Pittsburgh, U.S.A.
University of Colorado Boulder, Boulder, U.S.A.
J.P. Cumalat, W.T. Ford, F. Jensen, A. Johnson, M. Krohn, T. Mulholland, K. Stenson,
Cornell University, Ithaca, U.S.A.
J. Thom, J. Tucker, P. Wittich, M. Zientek
Fair eld University, Fair eld, U.S.A.
J. Alexander, J. Chaves, J. Chu, S. Dittmer, K. Mcdermott, N. Mirman, G. Nicolas
Kaufman, J.R. Patterson, A. Rinkevicius, A. Ryd, L. Skinnari, L. So , S.M. Tan, Z. Tao,
Fermi National Accelerator Laboratory, Batavia, U.S.A.
S. Abdullin, M. Albrow, G. Apollinari, S. Banerjee, L.A.T. Bauerdick, A. Beretvas,
J. Berryhill, P.C. Bhat, G. Bolla, K. Burkett, J.N. Butler, H.W.K. Cheung, F. Chlebana,
S. Cihangiry, M. Cremonesi, V.D. Elvira, I. Fisk, J. Freeman, E. Gottschalk, L. Gray,
D. Green, S. Grunendahl, O. Gutsche, D. Hare, R.M. Harris, S. Hasegawa, J. Hirschauer,
Z. Hu, B. Jayatilaka, S. Jindariani, M. Johnson, U. Joshi, B. Klima, B. Kreis, S. Lammel,
J. Linacre, D. Lincoln, R. Lipton, T. Liu, R. Lopes De Sa, J. Lykken, K. Maeshima,
N. Magini, J.M. Marra no, S. Maruyama, D. Mason, P. McBride, P. Merkel, S. Mrenna,
S. Nahn, C. Newman-Holmesy, V. O'Dell, K. Pedro, O. Prokofyev, G. Rakness, L. Ristori,
E. Sexton-Kennedy, A. Soha, W.J. Spalding, L. Spiegel, S. Stoynev, N. Strobbe, L. Taylor,
S. Tkaczyk, N.V. Tran, L. Uplegger, E.W. Vaandering, C. Vernieri, M. Verzocchi, R. Vidal,
M. Wang, H.A. Weber, A. Whitbeck
University of Florida, Gainesville, U.S.A.
D. Acosta, P. Avery, P. Bortignon, D. Bourilkov, A. Brinkerho , A. Carnes, M. Carver,
D. Curry, S. Das, R.D. Field, I.K. Furic, J. Konigsberg, A. Korytov, P. Ma, K. Matchev,
H. Mei, P. Milenovic65, G. Mitselmakher, D. Rank, L. Shchutska, D. Sperka, L. Thomas,
J. Wang, S. Wang, J. Yelton
Florida International University, Miami, U.S.A.
S. Linn, P. Markowitz, G. Martinez, J.L. Rodriguez
A. Ackert, J.R. Adams, T. Adams, A. Askew, S. Bein, B. Diamond, S. Hagopian,
V. Hagopian, K.F. Johnson, A. Khatiwada, H. Prosper, A. Santra, M. Weinberg
Florida Institute of Technology, Melbourne, U.S.A.
M.M. Baarmand, V. Bhopatkar, S. Colafranceschi66, M. Hohlmann, D. Noonan, T. Roy,
University of Illinois at Chicago (UIC), Chicago, U.S.A.
M.R. Adams, L. Apanasevich, D. Berry, R.R. Betts, I. Bucinskaite, R. Cavanaugh,
O. Evdokimov, L. Gauthier, C.E. Gerber, D.J. Hofman, K. Jung, P. Kurt, C. O'Brien,
I.D. Sandoval Gonzalez, P. Turner, N. Varelas, H. Wang, Z. Wu, M. Zakaria, J. Zhang
The University of Iowa, Iowa City, U.S.A.
B. Bilki67, W. Clarida, K. Dilsiz, S. Durgut, R.P. Gandrajula, M. Haytmyradov, V.
Khristenko, J.-P. Merlo, H. Mermerkaya68, A. Mestvirishvili, A. Moeller, J. Nachtman, H. Ogul,
Y. Onel, F. Ozok69, A. Penzo, C. Snyder, E. Tiras, J. Wetzel, K. Yi
Johns Hopkins University, Baltimore, U.S.A.
I. Anderson, B. Blumenfeld, A. Cocoros, N. Eminizer, D. Fehling, L. Feng, A.V. Gritsan,
P. Maksimovic, C. Martin, M. Osherson, J. Roskes, U. Sarica, M. Swartz, M. Xiao, Y. Xin,
The University of Kansas, Lawrence, U.S.A.
A. Al-bataineh, P. Baringer, A. Bean, S. Boren, J. Bowen, C. Bruner, J. Castle,
L. Forthomme, R.P. Kenny III, A. Kropivnitskaya, D. Majumder, W. Mcbrayer, M. Murray,
S. Sanders, R. Stringer, J.D. Tapia Takaki, Q. Wang
Kansas State University, Manhattan, U.S.A.
A. Ivanov, K. Kaadze, S. Khalil, Y. Maravin, A. Mohammadi, L.K. Saini, N. Skhirtladze,
Lawrence Livermore National Laboratory, Livermore, U.S.A.
F. Rebassoo, D. Wright
University of Maryland, College Park, U.S.A.
C. Anelli, A. Baden, O. Baron, A. Belloni, B. Calvert, S.C. Eno, C. Ferraioli, J.A. Gomez,
N.J. Hadley, S. Jabeen, R.G. Kellogg, T. Kolberg, J. Kunkle, Y. Lu, A.C. Mignerey,
F. Ricci-Tam, Y.H. Shin, A. Skuja, M.B. Tonjes, S.C. Tonwar
Massachusetts Institute of Technology, Cambridge, U.S.A.
D. Abercrombie, B. Allen, A. Apyan, R. Barbieri, A. Baty, R. Bi, K. Bierwagen, S. Brandt,
W. Busza, I.A. Cali, Z. Demiragli, L. Di Matteo, G. Gomez Ceballos, M. Goncharov,
D. Hsu, Y. Iiyama, G.M. Innocenti, M. Klute, D. Kovalskyi, K. Krajczar, Y.S. Lai,
Y.-J. Lee, A. Levin, P.D. Luckey, A.C. Marini, C. Mcginn, C. Mironov, S. Narayanan,
X. Niu, C. Paus, C. Roland, G. Roland, J. Salfeld-Nebgen, G.S.F. Stephans, K. Sumorok,
K. Tatar, M. Varma, D. Velicanu, J. Veverka, J. Wang, T.W. Wang, B. Wyslouch, M. Yang,
A.C. Benvenuti, R.M. Chatterjee, A. Evans, A. Finkel, A. Gude, P. Hansen, S. Kalafut,
S.C. Kao, Y. Kubota, Z. Lesko, J. Mans, S. Nourbakhsh, N. Ruckstuhl, R. Rusack,
N. Tambe, J. Turkewitz
University of Mississippi, Oxford, U.S.A.
J.G. Acosta, S. Oliveros
University of Nebraska-Lincoln, Lincoln, U.S.A.
E. Avdeeva, R. Bartek, K. Bloom, D.R. Claes, A. Dominguez, C. Fangmeier, R. Gonzalez
Suarez, R. Kamalieddin, I. Kravchenko, A. Malta Rodrigues, F. Meier, J. Monroy,
J.E. Siado, G.R. Snow, B. Stieger
State University of New York at Bu alo, Bu alo, U.S.A.
M. Alyari, J. Dolen, J. George, A. Godshalk, C. Harrington, I. Iashvili, J. Kaisen,
A. Kharchilava, A. Kumar, A. Parker, S. Rappoccio, B. Roozbahani
Northeastern University, Boston, U.S.A.
G. Alverson, E. Barberis, A. Hortiangtham, A. Massironi, D.M. Morse, D. Nash, T.
Orimoto, R. Teixeira De Lima, D. Trocino, R.-J. Wang, D. Wood
Northwestern University, Evanston, U.S.A.
S. Bhattacharya, K.A. Hahn, A. Kubik, A. Kumar, J.F. Low, N. Mucia, N. Odell,
B. Pollack, M.H. Schmitt, K. Sung, M. Trovato, M. Velasco
University of Notre Dame, Notre Dame, U.S.A.
N. Dev, M. Hildreth, K. Hurtado Anampa, C. Jessop, D.J. Karmgard, N. Kellams,
K. Lannon, N. Marinelli, F. Meng, C. Mueller, Y. Musienko35, M. Planer, A. Reinsvold,
R. Ruchti, G. Smith, S. Taroni, M. Wayne, M. Wolf, A. Woodard
The Ohio State University, Columbus, U.S.A.
J. Alimena, L. Antonelli, J. Brinson, B. Bylsma, L.S. Durkin, S. Flowers, B. Francis,
A. Hart, C. Hill, R. Hughes, W. Ji, B. Liu, W. Luo, D. Puigh, B.L. Winer, H.W. Wulsin
Princeton University, Princeton, U.S.A.
S. Cooperstein, O. Driga, P. Elmer, J. Hardenbrook, P. Hebda, D. Lange, J. Luo,
D. Marlow, J. Mc Donald, T. Medvedeva, K. Mei, M. Mooney, J. Olsen, C. Palmer,
P. Piroue, D. Stickland, C. Tully, A. Zuranski
University of Puerto Rico, Mayaguez, U.S.A.
Purdue University, West Lafayette, U.S.A.
A. Barker, V.E. Barnes, S. Folgueras, L. Gutay, M.K. Jha, M. Jones, A.W. Jung,
D.H. Miller, N. Neumeister, J.F. Schulte, X. Shi, J. Sun, A. Svyatkovskiy, F. Wang, W. Xie,
Purdue University Calumet, Hammond, U.S.A.
N. Parashar, J. Stupak
A. Adair, B. Akgun, Z. Chen, K.M. Ecklund, F.J.M. Geurts, M. Guilbaud, W. Li,
B. Michlin, M. Northup, B.P. Padley, R. Redjimi, J. Roberts, J. Rorie, Z. Tu, J. Zabel
University of Rochester, Rochester, U.S.A.
B. Betchart, A. Bodek, P. de Barbaro, R. Demina, Y.t. Duh, T. Ferbel, M. Galanti,
A. Garcia-Bellido, J. Han, O. Hindrichs, A. Khukhunaishvili, K.H. Lo, P. Tan, M. Verzetti
Rutgers, The State University of New Jersey, Piscataway, U.S.A.
A. Agapitos, J.P. Chou, E. Contreras-Campana, Y. Gershtein, T.A. Gomez Espinosa,
E. Halkiadakis, M. Heindl, D. Hidas, E. Hughes, S. Kaplan, R. Kunnawalkam Elayavalli,
S. Kyriacou, A. Lath, K. Nash, H. Saka, S. Salur, S. Schnetzer, D. She eld, S. Somalwar,
R. Stone, S. Thomas, P. Thomassen, M. Walker
University of Tennessee, Knoxville, U.S.A.
A.G. Delannoy, M. Foerster, J. Heideman, G. Riley, K. Rose, S. Spanier, K. Thapa
Texas A&M University, College Station, U.S.A.
O. Bouhali70, A. Celik, M. Dalchenko, M. De Mattia, A. Delgado, S. Dildick, R. Eusebi,
J. Gilmore, T. Huang, E. Juska, T. Kamon71, R. Mueller, Y. Pakhotin, R. Patel, A. Perlo ,
L. Pernie, D. Rathjens, A. Rose, A. Safonov, A. Tatarinov, K.A. Ulmer
Texas Tech University, Lubbock, U.S.A.
N. Akchurin, C. Cowden, J. Damgov, F. De Guio, C. Dragoiu, P.R. Dudero, J. Faulkner,
E. Gurpinar, S. Kunori, K. Lamichhane, S.W. Lee, T. Libeiro, T. Peltola, S. Undleeb,
I. Volobouev, Z. Wang
Vanderbilt University, Nashville, U.S.A.
S. Greene, A. Gurrola, R. Janjam, W. Johns, C. Maguire, A. Melo, H. Ni, P. Sheldon,
S. Tuo, J. Velkovska, Q. Xu
University of Virginia, Charlottesville, U.S.A.
M.W. Arenton, P. Barria, B. Cox, J. Goodell, R. Hirosky, A. Ledovskoy, H. Li, C. Neu,
T. Sinthuprasith, X. Sun, Y. Wang, E. Wolfe, F. Xia
Wayne State University, Detroit, U.S.A.
C. Clarke, R. Harr, P.E. Karchin, J. Sturdy
University of Wisconsin - Madison, Madison, WI, U.S.A.
D.A. Belknap, C. Caillol, S. Dasu, L. Dodd, S. Duric, B. Gomber, M. Grothe, M. Herndon,
A. Herve, P. Klabbers, A. Lanaro, A. Levine, K. Long, R. Loveless, I. Ojalvo, T. Perry,
G.A. Pierro, G. Polese, T. Ruggles, A. Savin, N. Smith, W.H. Smith, D. Taylor, N. Woods
1: Also at Vienna University of Technology, Vienna, Austria
2: Also at State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing,
Haute Alsace Mulhouse, CNRS/IN2P3, Strasbourg, France
4: Also at Universidade Estadual de Campinas, Campinas, Brazil
5: Also at Universidade Federal de Pelotas, Pelotas, Brazil
6: Also at Universite Libre de Bruxelles, Bruxelles, Belgium
7: Also at Deutsches Elektronen-Synchrotron, Hamburg, Germany
8: Also at Joint Institute for Nuclear Research, Dubna, Russia
9: Also at Ain Shams University, Cairo, Egypt
10: Now at British University in Egypt, Cairo, Egypt
11: Also at Zewail City of Science and Technology, Zewail, Egypt
12: Also at Universite de Haute Alsace, Mulhouse, France
13: Also at Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University,
14: Also at CERN, European Organization for Nuclear Research, Geneva, Switzerland
15: Also at RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
16: Also at University of Hamburg, Hamburg, Germany
17: Also at Brandenburg University of Technology, Cottbus, Germany
18: Also at Institute of Nuclear Research ATOMKI, Debrecen, Hungary
19: Also at MTA-ELTE Lendulet CMS Particle and Nuclear Physics Group, Eotvos Lorand
20: Also at University of Debrecen, Debrecen, Hungary
21: Also at Indian Institute of Science Education and Research, Bhopal, India
22: Also at Institute of Physics, Bhubaneswar, India
23: Also at University of Visva-Bharati, Santiniketan, India
24: Also at University of Ruhuna, Matara, Sri Lanka
25: Also at Isfahan University of Technology, Isfahan, Iran
26: Also at University of Tehran, Department of Engineering Science, Tehran, Iran
27: Also at Yazd University, Yazd, Iran
28: Also at Plasma Physics Research Center, Science and Research Branch, Islamic Azad
29: Also at Universita degli Studi di Siena, Siena, Italy
30: Also at Purdue University, West Lafayette, U.S.A.
31: Also at International Islamic University of Malaysia, Kuala Lumpur, Malaysia
32: Also at Malaysian Nuclear Agency, MOSTI, Kajang, Malaysia
33: Also at Consejo Nacional de Ciencia y Tecnolog a, Mexico city, Mexico
34: Also at Warsaw University of Technology, Institute of Electronic Systems, Warsaw, Poland
35: Also at Institute for Nuclear Research, Moscow, Russia
at National Research
Nuclear University 'Moscow
Engineering Physics
Institute' (MEPhI), Moscow, Russia
37: Also at St. Petersburg State Polytechnical University, St. Petersburg, Russia
38: Also at University of Florida, Gainesville, U.S.A.
39: Also at P.N. Lebedev Physical Institute, Moscow, Russia
40: Also at California Institute of Technology, Pasadena, U.S.A.
41: Also at Budker Institute of Nuclear Physics, Novosibirsk, Russia
42: Also at Faculty of Physics, University of Belgrade, Belgrade, Serbia
43: Also at INFN Sezione di Roma; Universita di Roma, Roma, Italy
44: Also at Scuola Normale e Sezione dell'INFN, Pisa, Italy
45: Also at National and Kapodistrian University of Athens, Athens, Greece
47: Also at Institute for Theoretical and Experimental Physics, Moscow, Russia
48: Also at Albert Einstein Center for Fundamental Physics, Bern, Switzerland
49: Also at Adiyaman University, Adiyaman, Turkey
50: Also at Mersin University, Mersin, Turkey
51: Also at Cag University, Mersin, Turkey
52: Also at Piri Reis University, Istanbul, Turkey
53: Also at Gaziosmanpasa University, Tokat, Turkey
54: Also at Ozyegin University, Istanbul, Turkey
55: Also at Izmir Institute of Technology, Izmir, Turkey
56: Also at Marmara University, Istanbul, Turkey
57: Also at Kafkas University, Kars, Turkey
58: Also at Istanbul Bilgi University, Istanbul, Turkey
59: Also at Yildiz Technical University, Istanbul, Turkey
60: Also at Hacettepe University, Ankara, Turkey
68: Also at Erzincan University, Erzincan, Turkey
69: Also at Mimar Sinan University, Istanbul, Istanbul, Turkey
70: Also at Texas A&M University at Qatar, Doha, Qatar
71: Also at Kyungpook National University, Daegu, Korea
[14] CMS collaboration, The CMS experiment at the CERN LHC, 2008 JINST 3 S08004 [18] CMS collaboration, V. Veszpremi , Operation and performance of the CMS tracker , 2014 [21] M. Cacciari and G.P. Salam , Pileup subtraction using jet areas , Phys. Lett . B 659 ( 2008 ) 119 [23] T. Sjostrand , S. Mrenna and P.Z. Skands , A brief introduction to PYTHIA 8. 1 , Comput .
[24] R.D. Ball et al., Parton distributions with LHC data, Nucl. Phys. B 867 (2013) 244 [25] R. Field, Min-Bias and the Underlying Event at the LHC, Acta Phys. Polon. B 42 (2011) [30] J. Butterworth et al., PDF4LHC recommendations for LHC Run II, J. Phys. G 43 (2016) [31] A.L. Read, Presentation of search results: the CL(s) technique, J. Phys. G 28 (2002) 2693 France M. Schroder, I. Shvetsov, G. Sieber, H.J. Simonis, R. Ulrich, J. Wagner-Kuhr, S. Wayand, M. Weber, T. Weiler, S. Williamson, C. Wohrmann, R. Wolf Italy Italy L. Brianza14, M.E. Dinardoa;b, S. Fiorendia;b, S. Gennaia, A. Ghezzia;b, P. Govonia;b, M. Malberti, S. Malvezzia, R.A. Manzonia;b;14, D. Menascea, L. Moronia, M. Paganonia;b, D. Pedrinia, S. Pigazzini, S. Ragazzia;b, T. Tabarelli de Fatisa;b L. Baronea;b, F. Cavallaria, M. Cipriania;b, G. D'imperioa;b;14, D. Del Rea;b;14, M. Diemoza, Malaysia I. Ahmed, Z.A. Ibrahim, J.R. Komaragiri, M.A.B. Md Ali31, F. Mohamad Idris32, W.A.T. Wan Abdullah, M.N. Yusli, Z. Zolkapli Portugal P. Bargassa, C. Beir~ao Da Cruz E Silva, A. Di Francesco, P. Faccioli, P.G. Ferreira Parracho, M. Gallinaro, J. Hollar, N. Leonardo, L. Lloret Iglesias, M.V. Nemallapudi, J. Rodrigues Antunes, J. Seixas, O. Toldaiev, D. Vadruccio, J. Varela, P. Vischia Cortabitarte I.J. Cabrillo, A. Calderon, J.R. Castin~eiras De Saa, E. Curras, M. Fernandez, J. GarciaFerrero, G. Gomez, A. Lopez Virto, J. Marco, C. Martinez Rivero, F. Matorras, J. Piedra C. Dietz, F. Fiori, W.-S. Hou, Y. Hsiung, Y.F. Liu, R.-S. Lu, M. Min~ano Moya, E. Paganis, Thailand D. Arcaro, A. Avetisyan, T. Bose, D. Gastler, D. Rankin, C. Richardson, J. Rohlf, L. Sulak, M.B. Andrews, V. Azzolini, T. Ferguson, M. Paulini, J. Russ, M. Sun, H. Vogel, I. Vorobiev China 3: Also at Institut Pluridisciplinaire Hubert Curien, Universite de Strasbourg, Universite de Kingdom 61: Also at Rutherford Appleton Laboratory, Didcot, United Kingdom 62: Also at School of Physics and Astronomy, University of Southampton, Southampton, United 63: Also at Instituto de Astrof sica de Canarias, La Laguna, Spain 64: Also at Utah Valley University, Orem, U.S.A.
65: Also at University of Belgrade, Faculty of Physics and Vinca Institute of Nuclear Sciences , 66 : Also at Facolta Ingegneria, Universita di Roma, Roma, Italy 67 : Also at Argonne National Laboratory , Argonne, U.S.A.