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Azimuthal anisotropy of charged particles with transverse momentum up to 100 Ge...
CMS collaboration (2229 authors); Nayak, Aruna; Bargassa, Pedrame; Beirão Da Cruz E Silva, Cristóvão; Calpas, Betty; Di Francesco, AgostinoThe Fourier coefficients v2 and v3 characterizing the anisotropy of the azimuthal distribution of charged particles produced in PbPb collisions at sNN=5.02 TeV are measured with data collected by the CMS experiment. The measurements cover a broad transverse momentum range, 1<pT<100 GeV/c . The analysis focuses on the pT>10 GeV/c range, where anisotropic azimuthal distributions should reflect the path-length dep...
Measurement of the top quark mass using single top quark events in proton-proto...
CMS collaboration (2230 authors); Nayak, Aruna; Bargassa, Pedrame; Beirão Da Cruz E Silva, Cristóvão; Calpas, Betty; Di Francesco, AgostinoA measurement of the top quark mass is reported in events containing a single top quark produced via the electroweak t channel. The analysis is performed using data from proton-proton collisions collected with the CMS detector at the LHC at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 19.7 fb$^{-1}$ . Top quark candidates are reconstructed from their decay to a $\mathrm {W}$ bo...
Measurements of the associated production of a Z boson and b jets in pp collisi...
CMS collaboration (2296 authors); Calpas, Betty; Nayak, Aruna; Bargassa, Pedrame; Beirão Da Cruz E Silva, Cristóvão; Di Francesco, AgostinoMeasurements of the associated production of a Z boson with at least one jet originating from a b quark in proton-proton collisions at $\sqrt{s} =$ 8 TeV are presented. Differential cross sections are measured with data collected by the CMS experiment corresponding to an integrated luminosity of 19.8 inverse femtobarns. Z bosons are reconstructed through their decays to electrons and muons. Cross sections are m...
Measurement of prompt and nonprompt $\mathrm{J}/{\psi }$ production in $\mathrm...
CMS collaboration (2236 authors); Nayak, Aruna; Bargassa, Pedrame; Beirão Da Cruz E Silva, Cristóvão; Calpas, Betty; Di Francesco, AgostinoThis paper reports the measurement of $\mathrm{J}/{\psi }$ meson production in proton–proton ( $\mathrm {p}\mathrm {p}$ ) and proton–lead ( $\mathrm {p}\mathrm {Pb}$ ) collisions at a center-of-mass energy per nucleon pair of $5.02\,\text {TeV} $ by the CMS experiment at the LHC. The data samples used in the analysis correspond to integrated luminosities of 28 $\,\text {pb}^{-1}$ and 35 $\,\text {nb}^{-1}$ for ...
Search for top quark decays via Higgs-boson-mediated flavor-changing neutral cu...
CMS collaboration (2257 authors); Calpas, Betty; Nayak, Aruna; Bargassa, Pedrame; Beirão Da Cruz E Silva, Cristóvão; Di Francesco, AgostinoA search is performed for Higgs-boson-mediated flavor-changing neutral currents in the decays of top quarks. The search is based on proton-proton collision data corresponding to an integrated luminosity of 19.7 inverse-femtobarns at a center-of-mass energy of 8 TeV collected with the CMS detector at the LHC. Events in which a top quark pair is produced with one top quark decaying into a charm or up quark and a ...
Search for top squark pair production in compressed-mass-spectrum scenarios in ...
CMS collaboration (2296 authors); Calpas, Betty; Nayak, Aruna; Bargassa, Pedrame; Beirão Da Cruz E Silva, Cristóvão; Di Francesco, AgostinoAn inclusive search is performed for supersymmetry in final states containing jets and an apparent imbalance in transverse momentum, p→Tmiss , due to the production of unobserved weakly interacting particles in pp collisions at a centre-of-mass energy of 8 TeV. The data, recorded with the CMS detector at the CERN LHC, correspond to an integrated luminosity of 18.5 fb −1 . The dimensionless kinematic variable αT...
Search for Dark Matter and Supersymmetry with a Compressed Mass Spectrum in the...
CMS collaboration (2274 authors); Calpas, Betty; Nayak, Aruna; Bargassa, Pedrame; Beirão Da Cruz E Silva, Cristóvão; Di Francesco, AgostinoA first search for pair production of dark matter candidates through vector boson fusion in proton-proton collisions at s=8 TeV is performed with the CMS detector. The vector boson fusion topology enhances missing transverse momentum, providing a way to probe supersymmetry, even in the case of a compressed mass spectrum. The data sample corresponds to an integrated luminosity of 18.5 fb−1, recorded by the CMS...
Mechanical stability of the CMS strip tracker measured with a laser alignment s...
CMS collaboration (2231 authors); Nayak, Aruna; Bargassa, Pedrame; Beirão Da Cruz E Silva, Cristóvão; Calpas, Betty; Di Francesco, AgostinoThe CMS tracker consists of 206 m(2) of silicon strip sensors assembled on carbon fibre composite structures and is designed for operation in the temperature range from −25 to +25°C. The mechanical stability of tracker components during physics operation was monitored with a few μm resolution using a dedicated laser alignment system as well as particle tracks from cosmic rays and hadron-hadron collisions. Durin...
Search for anomalous Wtb couplings and flavour-changing neutral currents in t-c...
CMS collaboration (2259 authors); Calpas, Betty; Nayak, Aruna; Bargassa, Pedrame; Beirão Da Cruz E Silva, Cristóvão; Di Francesco, AgostinoSingle top quark events produced in the t channel are used to set limits on anomalous Wtb couplings and to search for top quark flavour-changing neutral current (FCNC) interactions. The data taken with the CMS detector at the LHC in proton-proton collisions at $ \sqrt{s}=7 $ and 8 TeV correspond to integrated luminosities of 5.0 and 19.7 fb$^{−1}$, respectively. The analysis is performed using events with one m...
Search for black holes in high-multiplicity final states in proton-proton colli...
CMS collaboration (2228 authors); Nayak, Aruna; Bargassa, Pedrame; Beirão Da Cruz E Silva, Cristóvão; Calpas, Betty; Di Francesco, AgostinoA search for new physics in energetic, high-multiplicity final states has been performed using proton–proton collision data collected with the CMS detector at a center-of-mass energy of 13 TeV and corresponding to an integrated luminosity of 2.3 fb−1 . The standard model background, dominated by multijet production, is determined exclusively from control regions in data. No statistically significant excess of e...