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Measurement of the inelastic proton-proton cross section at √s=13 TeV
(2018)Journal of High Energy PhysicsA measurement of the inelastic proton-proton cross section with the CMS detector at a center-of-mass energy of s√=13 TeV is presented. The analysis is based on events with energy deposits in the forward calorimeters, which cover pseudorapidities of −6.6 < η < −3.0 and +3.0 < η < +5.2. An inelastic cross section of 68.6 ± 0.5(syst) ± 1.6(lumi) mb is obtained for events with MX > 4.1 GeV and/or MY > 13 GeV, where MX and MY are the masses ...Journal Article -
Measurement of the underlying event activity in inclusive Z boson production in proton-proton collisions at √s=13 TeV
(2018)Journal of High Energy PhysicsThis paper presents a measurement of the underlying event activity in proton-proton collisions at a center-of-mass energy of 13 TeV, performed using inclusive Z boson production events collected with the CMS experiment at the LHC. The analyzed data correspond to an integrated luminosity of 2.1 fb−1. The underlying event activity is quantified in terms of the charged particle multiplicity, as well as of the scalar sum of the charged ...Journal Article -
Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13 TeV with the CMS-TOTEM precision proton spectrometer
(2018)Journal of High Energy PhysicsThe process pp → pℓ+ℓ−p(*), with ℓ+ℓ− a muon or an electron pair produced at midrapidity with mass larger than 110 GeV, has been observed for the first time at the LHC in pp collisions at s√=13 TeV. One of the two scattered protons is measured in the CMS-TOTEM precision proton spectrometer (CT-PPS), which operated for the first time in 2016. The second proton either remains intact or is excited and then dissociates into a low-mass state ...Journal Article -
Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at √s=13 TeV
(2018)Journal of High Energy PhysicsA search for a new scalar resonance decaying to a pair of Z bosons is performed in the mass range from 130 GeV to 3 TeV, and for various width scenarios. The analysis is based on proton-proton collisions recorded by the CMS experiment at the LHC in 2016, corresponding to an integrated luminosity of 35.9 fb−1 at a center-of-mass energy of 13 TeV. The Z boson pair decays are reconstructed using the 4ℓ, 2ℓ2q, and 2ℓ2ν final states, where ℓ ...Journal Article -
Performance of the CMS muon detector and muon reconstruction with proton-proton collisions at √s=13 TeV
(2018)Journal of InstrumentationThe CMS muon detector system, muon reconstruction software, and high-level trigger underwent significant changes in 2013–2014 in preparation for running at higher LHC collision energy and instantaneous luminosity. The performance of the modified system is studied using proton-proton collision data at center-of-mass energy √s=13 TeV, collected at the LHC in 2015 and 2016. The measured performance parameters, including spatial resolution, ...Journal Article -
Search for Physics Beyond the Standard Model in Events with High-Momentum Higgs Bosons and Missing Transverse Momentum in Proton-Proton Collisions at 13 TeV
(2018)Physical Review LettersA search for physics beyond the standard model in events with one or more high-momentum Higgs bosons, H, decaying to pairs of b quarks in association with missing transverse momentum is presented. The data, corresponding to an integrated luminosity of 35.9 fb−1, were collected with the CMS detector at the LHC in proton-proton collisions at the center-of-mass nergy √s=13 TeV. The analysis utilizes a new b quark tagging technique based ...Journal Article -
Bose-Einstein correlations in pp, pPb, and PbPb collisions at √sN N = 0.9–7 TeV
(2018)Physical Review CQuantum-statistical (Bose-Einstein) two-particle correlations are measured in pp collisions at √s=0.9, 2.76, and 7 TeV, as well as in pPb and peripheral PbPb collisions at nucleon-nucleon center-of-mass energies of 5.02 and 2.76 TeV, respectively, using the CMS detector at the Large Hadron Collider. Separate analyses are performed for same-sign unidentified charged particles as well as for same-sign pions and kaons identified via their ...Journal Article -
Search for a massive resonance decaying to a pair of Higgs bosons in the four b quark final state in proton–proton collisions at √ s = 13 TeV
(2018)Physics Letters BA search for a massive resonance decaying into a pair of standard model Higgs bosons, in a final state consisting of two b quark–antiquark pairs, is performed. A data sample of proton–proton collisions at a centre-of-mass energy of 13 TeV is used, collected by the CMS experiment at the CERN LHC in 2016, and corresponding to an integrated luminosity of 35.9fb −1. The Higgs bosons are highly Lorentz-boosted and are each reconstructed as a ...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 -
Measurement of angular parameters from the decay B0→K∗0𝜇+𝜇− in proton-proton collisions at 𝑠√= 8 TeV
(2018)Physics Letters BAngular distributions of the decay B0→K⁎0μ+μ− are studied using a sample of proton–proton collisions at s=8TeV collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 20.5fb−1. An angular analysis is performed to determine the P1 and P5 ′ parameters, where the P5 ′ parameter is of particular interest because of recent measurements that indicate a potential discrepancy with the standard model predictions. ...Journal Article