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Search for physics beyond the standard model in multilepton final states in proton-proton collisions at √s = 13 TeV
(2020)Journal of High Energy PhysicsA search for physics beyond the standard model in events with at least three charged leptons (electrons or muons) is presented. The data sample corresponds to an integrated luminosity of 137 fb−1 of proton-proton collisions at s√ = 13 TeV, collected with the CMS detector at the LHC in 2016–2018. The two targeted signal processes are pair production of type-III seesaw heavy fermions and production of a light scalar or pseudoscalar boson ...Journal Article -
Investigation into the event-activity dependence of ϒ(nS) relative production in proton-proton collisions at √s = 7 TeV
(2020)Journal of High Energy PhysicsThe ratios of the production cross sections between the excited gamma(2S) and gamma(3S) mesons and the gamma(1S) ground state, detected via their decay into two muons, are studied as a function of the number of charged particles in the event. The data are from proton-proton collisions at root s = 7TeV, corresponding to an integrated luminosity of 4.8 fb(-1), collected with the CMS detector at the LHC. Evidence of a decrease in these ratios ...Journal Article -
Search for electroweak production of a vector-like T quark using fully hadronic final states
(2020)Journal of High Energy PhysicsA search is performed for electroweak production of a vector-like top quark partner T of charge 2/3 in association with a top or bottom quark, using proton-proton collision data at s√ = 13 TeV collected by the CMS experiment at the LHC in 2016. The data sample corresponds to an integrated luminosity of 35.9 fb−1. The search targets T quarks over a wide range of masses and fractional widths, decaying to a top quark and either a Higgs boson ...Journal Article -
A search for the standard model Higgs boson decaying to charm quarks
(2020)Journal of High Energy PhysicsA direct search for the standard model Higgs boson, H, produced in association with a vector boson, V (W or Z), and decaying to a charm quark pair is presented. The search uses a data set of proton-proton collisions corresponding to an integrated luminosity of 35.9 fb−1, collected by the CMS experiment at the LHC in 2016, at a centre-of-mass energy of 13 TeV. The search is carried out in mutually exclusive channels targeting specific ...Journal Article -
Search for a charged Higgs boson decaying into top and bottom quarks in events with electrons or muons in proton-proton collisions at √s = 13 TeV
(2020)Journal of High Energy PhysicsA search is presented for a charged Higgs boson heavier than the top quark, produced in association with a top quark, or with a top and a bottom quark, and decaying into a top-bottom quark-antiquark pair. The search is performed using proton-proton collision data collected by the CMS experiment at the LHC at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb−1. Events are selected by the presence of a ...Journal Article -
Search for top squark pair production in a final state with two tau leptons in proton-proton collisions at √s = 13 TeV
(2020)Journal of High Energy PhysicsA search for pair production of the supersymmetric partner of the top quark, the top squark, in proton-proton collision events at s√ = 13 TeV is presented in a final state containing hadronically decaying tau leptons and large missing transverse momentum. This final state is highly sensitive to high-tan β or higgsino-like scenarios in which decays of electroweak gauginos to tau leptons are dominant. The search uses a data set corresponding ...Journal Article -
Search for dark matter particles produced in association with a Higgs boson in proton-proton collisions at √s = 13 TeV
(2020)Journal of High Energy PhysicsA search for dark matter (DM) particles is performed using events with a Higgs boson candidate and large missing transverse momentum. The analysis is based on proton- proton collision data at a center-of-mass energy of 13 TeV collected by the CMS experiment at the LHC in 2016, corresponding to an integrated luminosity of 35.9 fb−1. The search is performed in five Higgs boson decay channels: h→bb⎯⎯⎯, γγ, τ+τ−, W+W−, and ZZ. The results ...Journal Article -
Search for a heavy Higgs boson decaying to a pair of W bosons in proton-proton collisions at √s = 13 TeV
(2020)Journal of High Energy PhysicsA search for a heavy Higgs boson in the mass range from 0.2 to 3.0 TeV, decaying to a pair of W bosons, is presented. The analysis is based on proton-proton collisions at 𝑠��√ = 13 TeV recorded by the CMS experiment at the LHC in 2016, corresponding to an integrated luminosity of 35.9 fb−1. The W boson pair decays are reconstructed in the 2ℓ2ν and ℓν2q final states (with ℓ = e or μ). Both gluon fusion and vector boson fusion production ...Journal Article -
Bose-Einstein correlations of charged hadrons in proton-proton collisions at √s = 13 TeV
(2020)Journal of High Energy PhysicsBose-Einstein correlations of charged hadrons are measured over a broad multiplicity range, from a few particles up to about 250 reconstructed charged hadrons in proton-proton collisions at 𝑠�√ = 13 TeV. The results are based on data collected using the CMS detector at the LHC during runs with a special low-pileup configuration. Three analysis techniques with different degrees of dependence on simulations are used to remove the ...Journal Article -
Measurement of the top quark pair production cross section in dilepton final states containing one τ lepton in pp collisions at √s= 13 TeV
(2020)Journal of High Energy PhysicsThe cross section of top quark pair production is measured in the tt¯→(ℓνℓ)(τhντ)bb¯ final state, where τh refers to the hadronic decays of the τ lepton, and ℓ is either an electron or a muon. The data sample corresponds to an integrated luminosity of 35.9 fb−1 collected in proton-proton collisions at s = 13 TeV with the CMS detector. The measured cross section is σt t ¯ = 781 ± 7 (stat) ± 62 (syst) ± 20 (lumi) pb, and the ratio of the ...Journal Article