Advanced search    

Search: authors:"A. M. Sirunyan"

272 papers found.
Use AND, OR, NOT, +word, -word, "long phrase", (parentheses) to fine-tune your search.

Search for a heavy resonance decaying to a top quark and a vector-like top quark at \( \sqrt{s}=13 \) TeV

A search is presented for massive spin-1 Z′ resonances decaying to a top quark and a heavy vector-like top quark partner T. The search is based on a 2.6 fb−1 sample of proton-proton collisions at 13 TeV collected with the CMS detector at the LHC. The analysis is optimized for final states in which the T quark decays to a W boson and a bottom quark. The focus is on all-jet final ...

Measurement of the \( \mathrm{t}\overline{\mathrm{t}} \) production cross section using events with one lepton and at least one jet in pp collisions at \( \sqrt{s}=13 \) TeV

A measurement of the \( \mathrm{t}\overline{\mathrm{t}} \) production cross section at \( \sqrt{s}=13 \) TeV is presented using proton-proton collisions, corresponding to an integrated luminosity of 2.2 fb−1, collected with the CMS detector at the LHC. Final states with one isolated charged lepton (electron or muon) and at least one jet are selected and categorized according to the ...

Search for physics beyond the standard model in events with two leptons of same sign, missing transverse momentum, and jets in proton–proton collisions at \(\sqrt{s} = 13\,\text {TeV} \)

source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP3. Yerevan Physics Institute, Yerevan, Armenia A. M. Sirunyan, A. Tumasyan Institut für

Searches for W′ bosons decaying to a top quark and a bottom quark in proton-proton collisions at 13 TeV

Searches are presented for heavy gauge bosons decaying into a top and a bottom quark in data collected by the CMS experiment at \( \sqrt{s}=13 \) TeV that correspond to an integrated luminosity of 2.2 and 2.6 fb−1 in the leptonic and hadronic analyses, respectively. Two final states are analyzed, one containing a single electron, or muon, and missing transverse momentum, and the ...

Measurement of the inclusive energy spectrum in the very forward direction in proton-proton collisions at \( \sqrt{s}=13 \) TeV

The differential cross section for inclusive particle production as a function of energy in proton-proton collisions at a center-of-mass energy of 13 TeV is measured in the very forward region of the CMS detector. The measurement is based on data collected with the CMS apparatus at the LHC, and corresponds to an integrated luminosity of 0.34 μb−1. The energy is measured in the ...

Search for top quark partners with charge 5/3 in proton-proton collisions at \( \sqrt{s}=13 \) TeV

A search for the production of heavy partners of the top quark with charge 5/3 (X5/3) decaying into a top quark and a W boson is performed with a data sample corresponding to an integrated luminosity of 2.3 fb−1, collected in proton-proton collisions at a center-of-mass energy of 13 TeV with the CMS detector at the CERN LHC. Final states with either a pair of same-sign leptons or a ...

Search for new physics with dijet angular distributions in proton-proton collisions at \( \sqrt{s}=13 \) TeV

A search is presented for extra spatial dimensions, quantum black holes, and quark contact interactions in measurements of dijet angular distributions in proton-proton collisions at \( \sqrt{s}=13 \) TeV. The data were collected with the CMS detector at the LHC and correspond to an integrated luminosity of 2.6 fb−1. The distributions are found to be in agreement with predictions ...

Search for \( \mathrm{t}\overline{\mathrm{t}} \) resonances in highly boosted lepton+jets and fully hadronic final states in proton-proton collisions at \( \sqrt{s}=13 \) TeV

A search for the production of heavy resonances decaying into top quark-antiquark pairs is presented. The analysis is performed in the lepton+jets and fully hadronic channels using data collected in proton-proton collisions at \( \sqrt{s}=13 \) TeV using the CMS detector at the LHC, corresponding to an integrated luminosity of 2.6 fb−1. The selection is optimized for massive ...

Search for associated production of a Z boson with a single top quark and for tZ flavour-changing interactions in pp collisions at \( \sqrt{s}=8 \) TeV

A search for the production of a single top quark in association with a Z boson is presented, both to identify the expected standard model process and to search for flavour-changing neutral current interactions. The data sample corresponds to an integrated luminosity of 19.7 fb−1 recorded by the CMS experiment at the LHC in proton-proton collisions at \( \sqrt{s}=8 \) TeV. Final ...

Measurement of double-differential cross sections for top quark pair production in pp collisions at \(\sqrt{s} = 8\) \(\,\text {TeV}\) and impact on parton distribution functions

observed in the 18-parameter fit at NLO (Fig. 17). Page 30 of 45 CMS Collaboration Yerevan Physics Institute, Yerevan, Armenia A. M. Sirunyan, A. Tumasyan Institut für Hochenergiephysik, Vienna, Austria W

Measurement of the jet mass in highly boosted \({\mathrm{t}}\overline{\mathrm{t}}\) events from pp collisions at \(\sqrt{s}=8\) \(\,\text {TeV}\)

Collaboration Yerevan Physics Institute, Yerevan, Armenia A. M. Sirunyan, A. Tumasyan Institute for Nuclear Problems, Minsk, Belarus O. Dvornikov, V. Makarenko, V. Mossolov, J. Suarez Gonzalez, V. Zykunov

Search for dark matter produced with an energetic jet or a hadronically decaying W or Z boson at \( \sqrt{s}=13 \) TeV

A search for dark matter particles is performed using events with large missing transverse momentum, at least one energetic jet, and no leptons, in proton-proton collisions at \( \sqrt{s}=13 \) TeV collected with the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of 12.9 fb−1. The search includes events with jets from the hadronic decays of a W or ...

Search for third-generation scalar leptoquarks and heavy right-handed neutrinos in final states with two tau leptons and two jets in proton-proton collisions at \( \sqrt{s}=13 \) TeV

A search is performed for third-generation scalar leptoquarks and heavy right-handed neutrinos in events containing one electron or muon, one hadronically decaying τ lepton, and at least two jets, using a \( \sqrt{s}=13 \) TeV pp collision data sample corresponding to an integrated luminosity of 12.9 fb-1 collected with the CMS detector at the LHC in 2016. The number of observed ...

Identification techniques for highly boosted W bosons that decay into hadrons

In searches for new physics in the energy regime of the LHC, it is becoming increasingly important to distinguish single-jet objects that originate from the merging of the decay products of W bosons produced with high transverse momenta from jets initiated by single partons. Algorithms are defined to identify such W jets for different signals of interest, using techniques that are ...

Measurement of electroweak-induced production of Wγ with two jets in pp collisions at \( \sqrt{s}=8 \) TeV and constraints on anomalous quartic gauge couplings

A measurement of electroweak-induced production of Wγ and two jets is performed, where the W boson decays leptonically. The data used in the analysis correspond to an integrated luminosity of 19.7 fb−1 collected by the CMS experiment in \( \sqrt{s}=8 \) TeV proton-proton collisions produced at the LHC. Candidate events are selected with exactly one muon or electron, missing ...

Measurement of top quark–antiquark pair production in association with a W or Z boson in pp collisions at \(\sqrt{s} = 8\) \(\,\text {TeV}\)

source are credited. Funded by SCOAP3 / License Version CC BY 4.0. The CMS Collaboration Yerevan Physics Institute, Yerevan, Armenia V. Khachatryan, A. M. Sirunyan, A. Tumasyan Institut fr

Measurement of the top quark mass using single top quark events in proton-proton collisions at \(\sqrt{s}= 8\) TeV

. Mossolov, J. Suarez Gonzalez, V. Zykunov 3 Yerevan Physics Institute , Yerevan , Armenia A. M. Sirunyan, A. Tumasyan 4 University of Sofia , Sofia, Bulgaria A. Dimitrov, I. Glushkov, L. Litov, B. Pavlov, P

Observation of Y(1S) pair production in proton-proton collisions at \( \sqrt{s}=8 \) TeV

Pair production of Y(1S) mesons is observed at the LHC in proton-proton collisions at \( \sqrt{s}=8 \) TeV by the CMS experiment in a data sample corresponding to an integrated luminosity of 20.7 fb−1. Both Y(1S) candidates are fully reconstructed via their decays to μ + μ −. The fiducial acceptance region is defined by an absolute Y(1S) rapidity smaller than 2.0. The fiducial ...

Search for single production of vector-like quarks decaying to a Z boson and a top or a bottom quark in proton-proton collisions at \( \sqrt{s}=13 \) TeV

A search for single production of vector-like quarks, T and B, decaying into a Z boson and a top or a bottom quark, respectively, is presented. The search is performed using data collected by the CMS experiment at the LHC in proton-proton collisions at \( \sqrt{s}=13 \) TeV, corresponding to an integrated luminosity of 2.3fb−1. An exotic T quark production mode through the decay of ...