Search
Results
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Observation of Higgs Boson Decay to Bottom Quarks
(2018)Physical Review LettersThe observation of the standard model (SM) Higgs boson decay to a pair of bottom quarks is presented. The main contribution to this result is from processes in which Higgs bosons are produced in association with a W or Z boson (VH), and are searched for in final states including 0, 1, or 2 charged leptons and two identified bottom quark jets. The results from the measurement of these processes in a data sample recorded by the CMS experiment ...Journal Article -
Search for dark matter in events with energetic, hadronically decaying top quarks and missing transverse momentum at √s=13 TeV
(2018)Journal of High Energy PhysicsA search for dark matter is conducted in events with large missing transverse momentum and a hadronically decaying, Lorentz-boosted top quark. This study is performed using proton-proton collisions at a center-of-mass energy of 13 TeV, in data recorded by the CMS detector in 2016 at the LHC, corresponding to an integrated luminosity of 36 fb−1. New substructure techniques, including the novel use of energy correlation functions, are ...Journal Article -
Suppression of Excited Υ States Relative to the Ground State in Pb-Pb Collisions at √sNN=5.02 TeV
(2018)Physical Review LettersThe relative yields of Υ mesons produced in pp and Pb-Pb collisions at √sNN=5.02 TeV and reconstructed via the dimuon decay channel are measured using data collected by the CMS experiment. Double ratios are formed by comparing the yields of the excited states, Υ(2S) and Υ(3S), to the ground state, Υ(1S), in both Pb-Pb and pp collisions at the same center-of-mass energy. The double ratios, [Υ(nS)/Υ(1S)]Pb−Pb/[Υ(nS)/Υ(1S)]pp, are measured ...Journal Article -
Search for the pair production of third-generation squarks with two-body decays to a bottom or charm quark and a neutralino in proton–proton collisions at √s = 13 TeV
(2018)Physics Letters BResults are presented from a search for the pair production of third-generation squarks in proton–proton collision events with two-body decays to bottom or charm quarks and a neutralino, which produces a significant imbalance in the transverse momentum. The search is performed using a sample of proton–proton collision data at s=13TeV recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 35.9 fb−1. No ...Journal Article -
Inclusive search for a highly boosted Higgs boson decaying to a bottom quark-antiquark pair
(2018)Physical Review LettersAn inclusive search for the standard model Higgs boson (H) produced with large transverse momentum (pT) and decaying to a bottom quark-antiquark pair (bb͞) is performed using a data set of pp collisions at √s=13 TeV collected with the CMS experiment at the LHC. The data sample corresponds to an integrated luminosity of 35.9 fb−1. A highly Lorentz-boosted Higgs boson decaying to bb͞ is reconstructed as a single, large radius jet, and it ...Journal Article -
Measurements of the p p → Z Z production cross section and the Z → 4 ℓ branching fraction, and constraints on anomalous triple gauge couplings at √s=13TeV
(2018)The European Physical Journal CFour-lepton production in proton-proton collisions, pp→(Z/γ∗)(Z/γ∗)→4ℓ, where ℓ=e or μ, is studied at a center-of-mass energy of 13TeV with the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of 35.9fb−1. The ZZ production cross section, σ(pp→ZZ)=17.2±0.5(stat)±0.7(syst)±0.4(theo)±0.4(lumi) pb, measured using events with two opposite-sign, same-flavor lepton pairs produced in the mass region 60<mℓ+ℓ−<120GeV, ...Journal Article -
Search for pair production of excited top quarks in the lepton + jets final state
(2018)Physics Letters BA search is performed for the pair production of spin-3/2 excited top quarks, each decaying to a top quark and a gluon. The search uses the data collected with the CMS detector from proton–proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9fb-1. Events are selected by requiring an isolated muon or electron, an imbalance in the transverse momentum, and at least six jets of which exactly ...Journal Article -
Search for excited quarks of light and heavy flavor in γ + jet final states in proton–proton collisions at √ s = 13 TeV
(2018)Physics Letters BA search is presented for excited quarks of light and heavy flavor that decay to γ + jet final states. The analysis is based on data corresponding to an integrated luminosity of 35.9fb−1 collected by the CMS experiment in proton–proton collisions at √s = 13 TeV at the LHC. A signal would appear as a resonant contribution to the invariant mass spectrum of the γ + jet system, above the background expected from standard model processes. No ...Journal Article -
Search for new physics in events with two soft oppositely charged leptons and missing transverse momentum in proton–proton collisions at s=13TeV
(2018)Physics Letters BA search is presented for new physics in events with two low-momentum, oppositely charged leptons (electrons or muons) and missing transverse momentum in proton-proton collisions at a centre-of-mass energy of 13 TeV. The data collected using the CMS detector at the LHC correspond to an integrated luminosity of 35.9. The observed event yields are consistent with the expectations from the standard model. The results are interpreted in terms ...Journal Article -
Measurement of b hadron lifetimes in pp collisions at √s=8TeV
(2018)The European Physical Journal CMeasurements are presented of the lifetimes of the B0, B0s, Λ0b, and B+c hadrons using the decay channels B0→J/ψK∗(892)0, B0→J/ψK0S, B0s→J/ψπ+π−, B0s→J/ψϕ(1020), Λ0b→J/ψΛ0, and B+c→J/ψπ+. The data sample, corresponding to an integrated luminosity of 19.7fb-1, was collected by the CMS detector at the LHC in proton–proton collisions at s√=8TeV. The B0 lifetime is measured to be 453.0±1.6(stat)±1.8(syst)μm in J/ψK∗(892)0and 457.8±2.7(stat) ...Journal Article