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248 papers found.
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Measurement of the \({\mathrm {t}\overline{\mathrm {t}}}\) production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at \(\sqrt{s}=13\,\text {Te}\text {V} \)

A measurement of the top quark–antiquark pair production cross section \(\sigma _{\mathrm {t}\overline{\mathrm {t}}} \) in proton–proton collisions at a centre-of-mass energy of 13\(\,\text {Te}\text {V}\) is presented. The data correspond to an integrated luminosity of \(35.9{\,\text {fb}^{-1}} \), recorded by the CMS experiment at the CERN LHC in 2016. Dilepton events...

Measurement of the top quark mass in the all-jets final state at \(\sqrt{s}=13\,\text {TeV} \) and combination with the lepton+jets channel

A top quark mass measurement is performed using \(35.9{\,\text {fb}^{-1}} \) of LHC proton–proton collision data collected with the CMS detector at \(\sqrt{s}=13\,\text {TeV} \). The measurement uses the \({\mathrm {t}\overline{\mathrm {t}}}\) all-jets final state. A kinematic fit is performed to reconstruct the decay of the \({\mathrm {t}\overline{\mathrm {t}}}\)  system and...

Search for resonant production of second-generation sleptons with same-sign dimuon events in proton–proton collisions at \(\sqrt{s} = 13\,\text {TeV} \)

A search is presented for resonant production of second-generation sleptons (\(\widetilde{\mu } _{\mathrm {L}}\), \(\widetilde{\nu }_{\mu }\)) via the R-parity-violating coupling \({\lambda ^{\prime }_{211}}\) to quarks, in events with two same-sign muons and at least two jets in the final state. The smuon (muon sneutrino) is expected to decay into a muon and a neutralino...

Search for resonant \( \mathrm{t}\overline{\mathrm{t}} \) production in proton-proton collisions at \( \sqrt{s}=13 \) TeV

Abstract A search for a heavy resonance decaying into a top quark and antiquark \( \left(\mathrm{t}\overline{\mathrm{t}}\right) \) pair is performed using proton-proton collisions at \( \sqrt{s}=13 \) TeV. The search uses the data set collected with the CMS detector in 2016, which corresponds to an integrated luminosity of 35.9 fb−1. The analysis considers three exclusive final...

Measurement of exclusive \(\mathrm {\Upsilon }\) photoproduction from protons in \(\mathrm {p}\) Pb collisions at \(\sqrt{\smash [b]{s_{_{\mathrm {NN}}}}} = 5.02\,\text {TeV} \)

The exclusive photoproduction of \(\mathrm {\Upsilon }\mathrm {(nS)} \) meson states from protons, \(\gamma \mathrm {p} \rightarrow \mathrm {\Upsilon }\mathrm {(nS)} \,\mathrm {p}\) (with \(\mathrm {n}=1,2,3\)), is studied in ultraperipheral \(\mathrm {p}\)Pb collisions at a centre-of-mass energy per nucleon pair of \(\sqrt{\smash [b]{s_{_{\mathrm {NN}}}}} = 5.02\,\text {TeV...

Search for dark matter produced in association with a single top quark or a top quark pair in proton-proton collisions at \( \sqrt{s}=13 \) TeV

Abstract A search for dark matter produced in association with top quarks in proton-proton collisions at a center-of-mass energy of 13 TeV is presented. The data set used corresponds to an integrated luminosity of 35.9 fb−1 recorded with the CMS detector at the LHC. Whereas previous searches for neutral scalar or pseudoscalar mediators considered dark matter production in...

Measurement of associated production of a \(\mathrm {W}\) boson and a charm quark in proton–proton collisions at \(\sqrt{s} = 13\,\text {Te}\text {V} \)

Measurements are presented of associated production of a \(\mathrm {W}\) boson and a charm quark (\(\mathrm {W}+\mathrm {c}\)) in proton–proton collisions at a center-of-mass energy of 13\(\,\text {Te}\text {V}\). The data correspond to an integrated luminosity of 35.7\(\,\text {fb}^{-1}\) collected by the CMS experiment at the CERN LHC. The \(\mathrm {W}\) bosons are identified...

Search for a W′ boson decaying to a vector-like quark and a top or bottom quark in the all-jets final state

Abstract A search for a heavy W′ resonance decaying to one B or T vector-like quark and a top or bottom quark, respectively, is presented. The search uses proton-proton collision data collected in 2016 with the CMS detector at the LHC, corresponding to an integrated luminosity of 35.9 fb−1 at \( \sqrt{s}=13 \) TeV. Both decay channels result in a final state with a top quark, a...

Search for the pair production of light top squarks in the e±μ∓ final state in proton-proton collisions at \( \sqrt{s}=13 \) TeV

Abstract A search for the production of a pair of top squarks at the LHC is presented. This search targets a region of parameter space where the kinematics of top squark pair production and top quark pair production are very similar, because of the mass difference between the top squark and the neutralino being close to the top quark mass. The search is performed with 35.9 fb−1...

Search for top quark partners with charge 5/3 in the same-sign dilepton and single-lepton final states in proton-proton collisions at \( \sqrt{s}=13 \) TeV

Abstract A search for the pair production of heavy fermionic partners of the top quark with charge 5/3 (X5/3) is performed in proton-proton collisions at a center-of-mass energy of 13 TeV with the CMS detector at the CERN LHC. The data sample analyzed corresponds to an integrated luminosity of 35.9 fb−1. The X5/3 quark is assumed always to decay into a top quark and a W boson...

Search for a heavy resonance decaying to a top quark and a vector-like top quark in the lepton + jets final state in pp collisions at \(\sqrt{s} = 13\,\text {TeV} \)

A search is presented for a heavy spin-1 resonance \(\mathrm {Z}'\) decaying to a top quark and a vector-like top quark partner \(\text {T} \) in the lepton + jets final state. The search is performed using a data set of \(\mathrm {p}\) \(\mathrm {p}\) collisions at a centre-of-mass energy of 13\(\,\text {TeV}\) corresponding to an integrated luminosity of \(35.9{\,\text {fb}^{-1...

Inclusive search for supersymmetry in pp collisions at \( \sqrt{s}=13 \) TeV using razor variables and boosted object identification in zero and one lepton final states

Abstract An inclusive search for supersymmetry (SUSY) using the razor variables is performed using a data sample of proton-proton collisions corresponding to an integrated luminosity of 35.9 fb−1, collected with the CMS experiment in 2016 at a center-of-mass energy of \( \sqrt{s}=13 \) TeV. The search looks for an excess of events with large transverse energy, large jet...

Search for \( \mathrm{t}\overline{\mathrm{t}}\mathrm{H} \) production in the \( \mathrm{H}\to \mathrm{b}\overline{\mathrm{b}} \) decay channel with leptonic \( \mathrm{t}\overline{\mathrm{t}} \) decays in proton-proton collisions at \( \sqrt{s}=13 \) TeV

Abstract A search is presented for the associated production of a standard model Higgs boson with a top quark-antiquark pair (\( \mathrm{t}\overline{\mathrm{t}}\mathrm{H} \)), in which the Higgs boson decays into a b quark-antiquark pair, in proton-proton collisions at a centre-of-mass energy \( \sqrt{s}=13 \) TeV. The data correspond to an integrated luminosity of 35.9 fb−1...

Measurements of \( \mathrm{t}\overline{\mathrm{t}} \) differential cross sections in proton-proton collisions at \( \sqrt{\mathrm{s}}=13 \) TeV using events containing two leptons

Abstract Measurements of differential top quark pair \( \mathrm{t}\overline{\mathrm{t}} \) cross sections using events produced in proton-proton collisions at a centre-of-mass energy of 13 TeV containing two oppositely charged leptons are presented. The data were recorded by the CMS experiment at the CERN LHC in 2016 and correspond to an integrated luminosity of 35.9 fb−1. The...

Search for new physics in final states with a single photon and missing transverse momentum in proton-proton collisions at \( \sqrt{s}=13 \) TeV

Abstract A search is conducted for new physics in final states containing a photon and missing transverse momentum in proton-proton collisions at \( \sqrt{s}=13 \) TeV, using the data collected in 2016 by the CMS experiment at the LHC, corresponding to an integrated luminosity of 35.9 fb−1. No deviations from the predictions of the standard model are observed. The results are...

Study of the underlying event in top quark pair production in \(\mathrm {p}\mathrm {p}\) collisions at 13 \(~\text {Te}\text {V}\)

Measurements of normalized differential cross sections as functions of the multiplicity and kinematic variables of charged-particle tracks from the underlying event in top quark and antiquark pair production are presented. The measurements are performed in proton-proton collisions at a center-of-mass energy of 13\(~\text {Te}\text {V}\), and are based on data collected by the CMS...

Search for single production of vector-like quarks decaying to a top quark and a \(\mathrm {W} \) boson in proton–proton collisions at \(\sqrt{s} = 13 \,\text {TeV} \)

A search is presented for the single production of vector-like quarks in proton–proton collisions at \(\sqrt{s}=13\,\text {TeV} \). The data, corresponding to an integrated luminosity of 35.9\(\,\text {fb}^{-1}\), were recorded with the CMS experiment at the LHC. The analysis focuses on the vector-like quark decay into a top quark and a \(\mathrm {W} \) boson, with one muon or...

Search for rare decays of \(\mathrm {Z}\) and Higgs bosons to \({\mathrm {J}/\psi } \) and a photon in proton-proton collisions at \(\sqrt{s}\) = 13 \(\,\text {TeV}\)

A search is presented for decays of \(\mathrm {Z}\) and Higgs bosons to a \({\mathrm {J}/\psi } \) meson and a photon, with the subsequent decay of the \({\mathrm {J}/\psi } \) to \(\mathrm {\mu ^+}\mathrm {\mu ^-} \). The analysis uses data from proton-proton collisions with an integrated luminosity of 35.9\(\,\text {fb}^{-1}\) at \(\sqrt{s}=13\,\text {TeV} \) collected with the...

Measurement of inclusive and differential Higgs boson production cross sections in the diphoton decay channel in proton-proton collisions at \( \sqrt{s}=13 \) TeV

Abstract Measurements of the inclusive and differential production cross sections for the Higgs boson in the diphoton decay channel are performed using the data set of proton-proton collisions at \( \sqrt{s}=13 \) TeV collected by the CMS experiment at the LHC in 2016 and corresponding to an integrated luminosity of 35.9 fb−1. The cross sections are measured in a fiducial phase...