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Search for Leptoquarks Coupled to Third-Generation Quarks in Proton-Proton Collisions at √s =13 TeV
(2018)Physical Review LettersThree of the most significant measured deviations from standard model predictions, the enhanced decay rate for B→D(*)τν, hints of lepton universality violation in B→K(*)ℓℓ decays, and the anomalous magnetic moment of the muon, can be explained by the existence of leptoquarks (LQs) with large couplings to third-generation quarks and masses at the TeV scale. The existence of these states can be probed at the LHC in high energy proton-proton ...Journal Article -
Observation of Medium-Induced Modifications of Jet Fragmentation in Pb-Pb Collisions at 𝑠𝑁𝑁‾‾‾‾√= 5.02 TeV Using Isolated Photon-Tagged Jets
(2018)Physical Review LettersMeasurements of fragmentation functions for jets associated with an isolated photon are presented for the first time in pp and Pb-Pb collisions. The analysis uses data collected with the CMS detector at the CERN LHC at a nucleon-nucleon center-of-mass energy of 5.02 TeV. Fragmentation functions are obtained for jets with pTjet>30 GeV/c in events containing an isolated photon with pTγ>60 GeV/c, using charged tracks with transverse momentum ...Journal Article -
Angular analysis of the decay B+→K+μ+μ− in proton-proton collisions at √s=8 TeV
(2018)Physical Review DThe angular distribution of the flavor-changing neutral current decay B+→K+μ+μ− is studied in proton-proton collisions at a center-of-mass energy of 8 TeV. The analysis is based on data collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 20.5 fb−1. The forward-backward asymmetry AFB of the dimuon system and the contribution FH from the pseudoscalar, scalar, and tensor amplitudes to the decay width are ...Journal Article -
Search for pair-produced resonances decaying to quark pairs in proton-proton collisions at √s=13 TeV
(2018)Physical Review DA general search for the pair production of resonances, each decaying to two quarks, is reported. The search is conducted separately for heavier resonances (masses above 400 GeV), where each of the four final-state quarks generates a hadronic jet resulting in a four-jet signature, and for lighter resonances (masses between 80 and 400 GeV), where the pair of quarks from each resonance is collimated and reconstructed as a single jet resulting ...Journal Article -
Event shape variables measured using multijet final states in proton-proton collisions at √s=13 TeV
(2018)Journal of High Energy PhysicsThe study of global event shape variables can provide sensitive tests of predictions for multijet production in proton-proton collisions. This paper presents a study of several event shape variables calculated using jet four momenta in proton-proton collisions at a centre-of-mass energy of 13 TeV and uses data recorded with the CMS detector at the LHC corresponding to an integrated luminosity of 2.2 fb−1. After correcting for detector ...Journal Article -
Evidence for the Associated Production of a Single Top Quark and a Photon in Proton-Proton Collisions at s =13 TeV
(2018)Physical Review LettersThe first evidence of events consistent with the production of a single top quark in association with a photon is reported. The analysis is based on proton-proton collisions at √s=13 TeV and recorded by the CMS experiment in 2016, corresponding to an integrated luminosity of 35.9 fb−1. Events are selected by requiring the presence of a muon (μ), a photon (γ), an imbalance in transverse momentum from an undetected neutrino (ν), and at ...Journal Article -
Measurement of the top quark mass with lepton+jets final states using p p collisions at √s=13TeV
(2018)The European Physical Journal CThe mass of the top quark is measured using a sample of tt¯ events collected by the CMS detector using proton-proton collisions at s√=13 TeV at the CERN LHC. Events are selected with one isolated muon or electron and at least four jets from data corresponding to an integrated luminosity of 35.9fb−1. For each event the mass is reconstructed from a kinematic fit of the decay products to a tt¯ hypothesis. Using the ideogram method, the top ...Journal Article -
Search for an exotic decay of the Higgs boson to a pair of light pseudoscalars in the final state of two muons and two τ leptons in proton-proton collisions at √s=13 TeV
(2018)Journal of High Energy PhysicsA search for exotic Higgs boson decays to light pseudoscalars in the final state of two muons and two τ leptons is performed using proton-proton collision data recorded by the CMS experiment at the LHC at a center-of-mass energy of 13 TeV in 2016, corresponding to an integrated luminosity of 35.9 fb−1. Masses of the pseudoscalar boson between 15.0 and 62.5 GeV are probed, and no significant excess of data is observed above the prediction ...Journal Article -
Measurement of differential cross sections for Z boson production in association with jets in proton-proton collisions at √s=13TeV
(2018)The European Physical Journal CThe production of a Z boson, decaying to two charged leptons, in association with jets in proton-proton collisions at a centre-of-mass energy of 13TeV is measured. Data recorded with the CMS detector at the LHC are used that correspond to an integrated luminosity of 2.19fb-1. The cross section is measured as a function of the jet multiplicity and its dependence on the transverse momentum of the Z boson, the jet kinematic variables (transverse ...Journal Article -
Studies of B∗s2(5840)0 and Bs1(5830)0 mesons including the observation of the B∗s2(5840)0→B0K0S decay in proton-proton collisions at √s=8TeV
(2018)The European Physical Journal CMeasurements of B∗s2(5840)0 and Bs1(5830)0 mesons are performed using a data sample of proton-proton collisions corresponding to an integrated luminosity of Open image in new window , collected with the CMS detector at the LHC at a centre-of-mass energy of 8TeV. The analysis studies P-wave B0s meson decays into B(∗)+K− and B(∗)0K0S, where the B+ and B0 mesons are identified using the decays B+→J/ψK+ and B0→J/ψK∗(892)0. The masses of the ...Journal Article