Measurement of associated production of a W boson and a charm quark in proton-proton collisions at root s=13 Tev

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The CMS Collaboration , Sirunyan , A M , Eerola , P , Kirschenmann , H , Pekkanen , J , Voutilainen , M , Havukainen , J , Heikkilä , J K , Järvinen , T , Karimäki , V , Kinnunen , R , Lampén , T , Lassila-Perini , K , Laurila , S , Lehti , S , Lindén , T , Luukka , P , Mäenpää , T , Siikonen , H , Tuominen , E , Tuominiemi , J & Tuuva , T 2019 , ' Measurement of associated production of a W boson and a charm quark in proton-proton collisions at root s=13 Tev ' , European Physical Journal C. Particles and Fields , vol. 79 , no. 3 , 269 . https://doi.org/10.1140/epjc/s10052-019-6752-1

Title: Measurement of associated production of a W boson and a charm quark in proton-proton collisions at root s=13 Tev
Author: The CMS collaboration; Sirunyan, A. M.; Eerola, P.; Kirschenmann, H.; Pekkanen, J.; Voutilainen, M.; Havukainen, J.; Heikkilä, J. K.; Järvinen, T.; Karimäki, V.; Kinnunen, R.; Lampén, T.; Lassila-Perini, K.; Laurila, S.; Lehti, S.; Lindén, T.; Luukka, P.; Mäenpää, T.; Siikonen, H.; Tuominen, E.; Tuominiemi, J.; Tuuva, T.
Contributor: University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
Date: 2019-03-23
Language: eng
Number of pages: 31
Belongs to series: European Physical Journal C. Particles and Fields
ISSN: 1434-6044
URI: http://hdl.handle.net/10138/300836
Abstract: Measurements are presented of associated production of a W boson and a charm quark (W + c) in proton-proton collisions at a center-of-mass energy of 13 TeV. The data correspond to an integrated luminosity of 35.7 fb(-1) collected by the CMS experiment at the CERN LHC. The W bosons are identified by their decay into a muon and a neutrino. The charm quarks are tagged via the full reconstruction of D* (2010)(+/-) mesons that decay via D*(2010)(+/-) D-0 + pi(+/-) -> K--/+ + pi(+/-) + pi(+/-). A cross section is measured in the fiducial region defined by the muon transverse momentum p(T)(mu) > 26 GeV, muon pseudorapidity vertical bar eta(mu)vertical bar < 2.4, and charm quark transverse momentum p(T)(c) > 5 GeV. The inclusive cross section for this kinematic range is sigma(W + c) = 1026 +/- 31(stat)(-72)(+76) pb. The cross section is also measured differentially as a function of the pseudorapidity of the muon from the W boson decay. These measurements are compared with theoretical predictions and are used to probe the strange quark content of the proton.
Subject: 114 Physical sciences
3-LOOP SPLITTING FUNCTIONS
PARTON DENSITIES
QCD
FRAGMENTATION
EVOLUTION
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