The first observation of top quark production in proton-nucleus collisions is reported using proton-lead data collected by the CMS experiment at the CERN LHC at a nucleon-nucleon center-of-mass energy of sNN=8.16 TeV. The measurement is performed using events with exactly one isolated electron or muon candidate and at least four jets. The data sample corresponds to an integrated luminosity of 174 nb-1. The significance of the tt signal against the background-only hypothesis is above 5 standard deviations. The measured cross section is σtt=45±8 nb, consistent with predictions from perturbative quantum chromodynamics.

Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., et al. (2017). Observation of Top Quark Production in Proton-Nucleus Collisions. PHYSICAL REVIEW LETTERS, 119(24), 242001 [10.1103/PhysRevLett.119.242001].

Observation of Top Quark Production in Proton-Nucleus Collisions

BESCHI, ANDREA;Brianza, L.;Brivio, F.;Ciriolo, V.;Dinardo, M. E.;Fiorendi, S.;Ghezzi, A.;Govoni, P.;Malberti, M.;Manzoni, R. A.;Paganoni, M.;Pauwels, K.;Pigazzini, S.;Ragazzi, S.;Tabarelli De Fatis, T.;Lucchini, M. T.;De Guio, F.;
2017

Abstract

The first observation of top quark production in proton-nucleus collisions is reported using proton-lead data collected by the CMS experiment at the CERN LHC at a nucleon-nucleon center-of-mass energy of sNN=8.16 TeV. The measurement is performed using events with exactly one isolated electron or muon candidate and at least four jets. The data sample corresponds to an integrated luminosity of 174 nb-1. The significance of the tt signal against the background-only hypothesis is above 5 standard deviations. The measured cross section is σtt=45±8 nb, consistent with predictions from perturbative quantum chromodynamics.
Articolo in rivista - Articolo scientifico
LHC, CMS, top
English
2017
119
24
242001
242001
none
Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., et al. (2017). Observation of Top Quark Production in Proton-Nucleus Collisions. PHYSICAL REVIEW LETTERS, 119(24), 242001 [10.1103/PhysRevLett.119.242001].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/187534
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