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Search for the decay of a Higgs boson in the ℓℓγ channel in proton-proton collisions at √s=13 TeV
(2018)Journal of High Energy PhysicsA search for a Higgs boson decaying into a pair of electrons or muons and a photon is described. Higgs boson decays to a Z boson and a photon (H → Zγ → ℓℓγ, ℓ = e or μ), or to two photons, one of which has an internal conversion into a muon pair (H → γ*γ → μμγ) were considered. The analysis is performed using a data set recorded by the CMS experiment at the LHC from proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding ...Journal Article -
Search for a charged Higgs boson decaying to charm and bottom quarks in proton-proton collisions at √s=8 TeV
(2018)Journal of High Energy PhysicsA search for charged Higgs boson decaying to a charm and a bottom quark (H+→cb̄) is performed using 19.7 fb−1 of pp collision data at √s=8 TeV. The production mechanism investigated in this search is tt̄ pair production in which one top quark decays to a charged Higgs boson and a bottom quark and the other decays to a charged lepton, a neutrino, and a bottom quark. Charged Higgs boson decays to cb̄ are searched for, resulting in a final ...Journal Article -
Search for an exotic decay of the Higgs boson to a pair of light pseudoscalars in the final state with two b quarks and two τ leptons in proton–proton collisions at s=13TeV
(2018)Physics Letters BA search for an exotic decay of the Higgs boson to a pair of light pseudoscalar bosons is performed for the first time in the final state with two b quarks and two τ leptons. The search is motivated in the context of models of physics beyond the standard model (SM), such as two Higgs doublet models extended with a complex scalar singlet (2HDM + S), which include the next-to-minimal supersymmetric SM (NMSSM). The results are based on a ...Journal Article -
Study of jet quenching with isolated-photon+jet correlations in PbPb and pp collisions at √sNN = 5.02 T eV
(2018)Physics Letters BMeasurements of azimuthal angle and transverse momentum (pT) correlations of isolated photons and associated jets are reported for pp and PbPb collisions at √sNN=5.02 TeV. The data were recorded with the CMS detector at the CERN LHC. For events containing a leading isolated photon with pγT>40 GeV / c and an associated jet with pjetT>30 GeV/c, the photon+jet azimuthal correlation and pT imbalance in PbPb collisions are studied as functions ...Journal Article -
Search for Pair-Produced Resonances Each Decaying into at Least Four Quarks in Proton-Proton Collisions at s =13 TeV
(2018)Physical Review LettersThis Letter presents the results of a search for pair-produced particles of masses above 100 GeV that each decay into at least four quarks. Using data collected by the CMS experiment at the LHC in 2015–2016, corresponding to an integrated luminosity of 38.2 fb−1, reconstructed particles are clustered into two large jets of similar mass, each consistent with four-parton substructure. No statistically significant excess of data over the ...Journal Article -
Observation of the Z→𝜓ℓ+ℓ− Decay in pp Collisions at √s =13 TeV
(2018)Physical Review LettersThis Letter presents the observation of the rare Z boson decay Z→ψℓ+ℓ−. Here, ψ represents contributions from direct J/ψ and ψ(2S)→J/ψX, ℓ+ℓ− is a pair of electrons or muons, and the J/ψ meson is detected via its decay to μ+μ−. The sample of proton-proton collision data, collected by the CMS experiment at the LHC at a center-of-mass energy of 13 TeV, corresponds to an integrated luminosity of 35.9 fb−1. The signal is observed with a ...Journal Article -
Pseudorapidity and transverse momentum dependence of flow harmonics in p Pb and PbPb collisions
(2018)Physical Review CMeasurements of azimuthal angular correlations are presented for high-multiplicity pPb collisions at √sNN=5.02TeV and peripheral PbPb collisions at √sNN=2.76TeV. The data used in this work were collected with the Compact Muon Solenoid (CMS) detector at the European Organization for Nuclear Research (CERN) Large Hadron Collider (LHC). Fourier coefficients as functions of transverse momentum and pseudorapidity are studied using the scalar ...Journal Article -
Measurement of the production cross section for single top quarks in association with W bosons in proton-proton collisions at √s=13 TeV
(2018)Journal of High Energy PhysicsA measurement is presented of the associated production of a single top quark and a W boson in proton-proton collisions at s√=13 TeV by the CMS Collaboration at the CERN LHC. The data collected corresponds to an integrated luminosity of 35.9 fb−1. The measurement is performed using events with one electron and one muon in the final state along with at least one jet originated from a bottom quark. A multivariate discriminant, exploiting ...Journal Article -
Performance of reconstruction and identification of 𝜏 leptons decaying to hadrons and 𝜈𝜏 in pp collisions at √s=13 TeV
(2018)Journal of InstrumentationThe algorithm developed by the CMS Collaboration to reconstruct and identify τ leptons produced in proton-proton collisions at √s=7 and 8 TeV, via their decays to hadrons and a neutrino, has been significantly improved. The changes include a revised reconstruction of π0 candidates, and improvements in multivariate discriminants to separate τ leptons from jets and electrons. The algorithm is extended to reconstruct τ leptons in highly ...Journal Article -
Charged-particle nuclear modification factors in XeXe collisions at √sNN=5.44 TeV
(2018)Journal of High Energy PhysicsThe differential yields of charged particles having pseudorapidity within |η| < 1 are measured using xenon-xenon (XeXe) collisions at sNN−−−√=5.44 TeV. The data, corresponding to an integrated luminosity of 3.42 μb−1, were collected in 2017 by the CMS experiment at the LHC. The yields are reported as functions of collision centrality and transverse momentum, pT, from 0.5 to 100 GeV. A previously reported pT spectrum from proton-proton ...Journal Article