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125 papers found.
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Search for a heavy pseudoscalar boson decaying to a Z and a Higgs boson at \(\sqrt{s}=13\,\text {Te}\text {V} \)

A search is presented for a heavy pseudoscalar boson \(\text {A}\) decaying to a Z  boson and a Higgs boson with mass of 125\(\,\text {GeV}\). In the final state considered, the Higgs boson decays to a bottom quark and antiquark, and the Z  boson decays either into a pair of electrons, muons, or neutrinos. The analysis is performed using a data sample corresponding to an...

Measurement of the energy density as a function of pseudorapidity in proton–proton collisions at \(\sqrt{s} =13\,\text {TeV} \)

A measurement of the energy density in proton–proton collisions at a centre-of-mass energy of \(\sqrt{s} =13\) \(\,\text {TeV}\) is presented. The data have been recorded with the CMS experiment at the LHC during low luminosity operations in 2015. The energy density is studied as a function of pseudorapidity in the ranges \(-\,6.6<\eta <-\,5.2\) and \(3.15<|\eta |<5.20\). The...

Search for contact interactions and large extra dimensions in the dilepton mass spectra from proton-proton collisions at \( \sqrt{s}=13 \) TeV

Abstract A search for nonresonant excesses in the invariant mass spectra of electron and muon pairs is presented. The analysis is based on data from proton-proton collisions at a center-of-mass energy of 13 TeV recorded by the CMS experiment in 2016, corresponding to a total integrated luminosity of 36 fb−1. No significant deviation from the standard model is observed. Limits are...

Search for new physics in dijet angular distributions using proton–proton collisions at \(\sqrt{s}=13\hbox {TeV}\) and constraints on dark matter and other models

A search is presented for physics beyond the standard model, based on measurements of dijet angular distributions in proton–proton collisions at \(\sqrt{s}=13\hbox {TeV}\). The data collected with the CMS detector at the LHC correspond to an integrated luminosity of 35.9\(\,\text {fb}^{-1}\). The observed distributions, corrected to particle level, are found to be in agreement...

Search for a heavy resonance decaying into a Z boson and a Z or W boson in 2ℓ2q final states at \( \sqrt{s}=13 \) TeV

Abstract A search has been performed for heavy resonances decaying to ZZ or ZW in 2ℓ2q final states, with two charged leptons (ℓ = e, μ) produced by the decay of a Z boson, and two quarks produced by the decay of a W or Z boson. The analysis is sensitive to resonances with masses in the range from 400 to 4500 GeV. Two categories are defined based on the merged or resolved...

Search for narrow and broad dijet resonances in proton-proton collisions at \( \sqrt{s}=13 \) TeV and constraints on dark matter mediators and other new particles

Abstract Searches for resonances decaying into pairs of jets are performed using proton-proton collision data collected at \( \sqrt{s}=13 \) TeV corresponding to an integrated luminosity of up to 36 fb−1. A low-mass search, for resonances with masses between 0.6 and 1.6 TeV, is performed based on events with dijets reconstructed at the trigger level from calorimeter information...

Search for disappearing tracks as a signature of new long-lived particles in proton-proton collisions at \( \sqrt{s}=13 \) TeV

Abstract A search is presented for long-lived charged particles that decay within the CMS detector and produce the signature of a disappearing track. A disappearing track is an isolated track with missing hits in the outer layers of the silicon tracker, little or no energy in associated calorimeter deposits, and no associated hits in the muon detectors. This search uses data...

Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at \( \sqrt{s}=13 \) TeV

Abstract A measurement is performed of the cross section of top quark pair production in association with a W or Z boson using proton-proton collisions at a center-of-mass energy of 13 TeV at the LHC. The data sample corresponds to an integrated luminosity of 35.9 fb−1, collected by the CMS experiment in 2016. The measurement is performed in the same-sign dilepton, three- and...

Measurement of the inelastic proton-proton cross section at \( \sqrt{s}=13 \) TeV

Abstract A measurement of the inelastic proton-proton cross section with the CMS detector at a center-of-mass energy of \( \sqrt{s}=13 \) TeV is presented. The analysis is based on events with energy deposits in the forward calorimeters, which cover pseudorapidities of −6.6 < η < −3.0 and +3.0 < η < +5.2. An inelastic cross section of 68.6 ± 0.5(syst) ± 1.6(lumi) mb is obtained...

Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13 TeV with the CMS-TOTEM precision proton spectrometer

, Austria W. Adam, F. Ambrogi, E. Asilar, T. Bergauer, J. Brandstetter, E. Brondolin, M. Dragicevic, J. Ero, A. Escalante Del Valle, M. Flechl, M. Friedl, R. Fruhwirth1, V.M. Ghete, J. Grossmann, J. Hrubec

Electroweak production of two jets in association with a Z boson in proton–proton collisions at \(\sqrt{s}= \) 13 \(\,\text {TeV}\)

A measurement of the electroweak (EW) production of two jets in association with a \(\mathrm {Z} \) boson in proton-proton collisions at \(\sqrt{s}=13\,\text {TeV} \) is presented, based on data recorded in 2016 by the CMS experiment at the LHC corresponding to an integrated luminosity of 35.9\(\,\text {fb}^{\text {--}1}\). The measurement is performed in the \(\ell \ell \mathrm...

Search for a heavy resonance decaying into a Z boson and a vector boson in the \( \nu \overline{\nu}\mathrm{q}\overline{\mathrm{q}} \) final state

Institute, Yerevan, Armenia A.M. Sirunyan, A. Tumasyan Institut fur Hochenergiephysik, Wien, Austria W. Adam, F. Ambrogi, E. Asilar, T. Bergauer, J. Brandstetter, E. Brondolin, M. Dragicevic, J. Ero, A

Azimuthal correlations for inclusive 2-jet, 3-jet, and 4-jet events in pp collisions at \(\sqrt{s}= 13~\hbox {TeV}\)

Azimuthal correlations between the two jets with the largest transverse momenta \(p_{\mathrm {T}}\) in inclusive 2-, 3-, and 4-jet events are presented for several regions of the leading jet \(p_{\mathrm {T}}\) up to 4\(\,\text {Te}\text {V}\). For 3- and 4-jet scenarios, measurements of the minimum azimuthal angles between any two of the three or four leading \(p_{\mathrm {T...

Measurement of the underlying event activity in inclusive Z boson production in proton-proton collisions at \( \sqrt{s}=13 \) TeV

Institute, Yerevan, Armenia A.M. Sirunyan, A. Tumasyan Institut fur Hochenergiephysik, Wien, Austria W. Adam, F. Ambrogi, E. Asilar, T. Bergauer, J. Brandstetter, E. Brondolin, M. Dragicevic, J. Ero, M

Search for high-mass resonances in final states with a lepton and missing transverse momentum at \( \sqrt{s}=13 \) TeV

, Armenia A.M. Sirunyan, A. Tumasyan Institut fur Hochenergiephysik, Wien, Austria W. Adam, F. Ambrogi, E. Asilar, T. Bergauer, J. Brandstetter, E. Brondolin, M. Dragicevic, J. Ero, A. Escalante Del Valle

Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at \( sqrt{s}=13 \) TeV

, Armenia A.M. Sirunyan, A. Tumasyan Institut fur Hochenergiephysik, Wien, Austria W. Adam, F. Ambrogi, E. Asilar, T. Bergauer, J. Brandstetter, E. Brondolin, M. Dragicevic, J. Ero, A. Escalante Del Valle

Search for high-mass resonances in dilepton final states in proton-proton collisions at \( \sqrt{s}=13 \) TeV

Abstract A search is presented for new high-mass resonances decaying into electron or muon pairs. The search uses proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the CMS experiment at the LHC in 2016, corresponding to an integrated luminosity of 36 fb−1. Observations are in agreement with standard model expectations. Upper limits on the product of a...

Search for \( \mathrm{t}\overline{\mathrm{t}}\mathrm{H} \) production in the all-jet final state in proton-proton collisions at \( \sqrt{s}=13 \) TeV

Abstract A search is presented for the associated production of a Higgs boson with a top quark pair in the all-jet final state. Events containing seven or more jets are selected from a sample of proton-proton collisions at \( \sqrt{s}=13 \) TeV collected with the CMS detector at the LHC in 2016, corresponding to an integrated luminosity of 35.9 fb−1. To separate the \( \mathrm{t...

Measurement of prompt and nonprompt charmonium suppression in \(\text {PbPb}\) collisions at 5.02 \(\,\text {Te}\text {V}\)

The nuclear modification factors of \({\mathrm {J}/\psi }\) and \(\psi \text {(2S)}\) mesons are measured in \(\text {PbPb}\) collisions at a centre-of-mass energy per nucleon pair of \(\sqrt{\smash [b]{s_{_{\text {NN}}}}} = 5.02\,\text {Te}\text {V} \). The analysis is based on \(\text {PbPb}\) and \(\mathrm {p}\mathrm {p}\) data samples collected by CMS at the LHC in 2015...

Measurement of b hadron lifetimes in pp collisions at \(\sqrt{s} = 8\) \(\,\text {Te}\text {V}\)

Measurements are presented of the lifetimes of the \({\mathrm {B}^0}\), \(\mathrm {B}^0_\mathrm {s}\), \(\mathrm {\Lambda }_\mathrm {b} ^0\), and \(\mathrm {B}_\mathrm {c}^+\) hadrons using the decay channels \({\mathrm {B}^0}\!\rightarrow \! \mathrm {J}/\psi \mathrm {K^{*}(892)}{}^{0}\), \({\mathrm {B}^0}\!\rightarrow \! \mathrm {J}/\psi \mathrm {K^0_S}\), \(\mathrm {B}^0_...