Measurement of the associated production of a Z boson with charm or bottom quark jets in proton-proton collisions at root s=13 TeV

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The CMS Collaboration , Sirunyan , A M , Eerola , P , Forthomme , L , Kirschenmann , H , Osterberg , K , Voutilainen , M , Garcia , F , Havukainen , J , Heikkila , J K , Karimäki , V , Kim , M , Kinnunen , R , Lampen , T , Lassila-Perini , K , Laurila , S , Lehti , S , Linden , T , Luukka , P , Maenpaa , T , Siikonen , H , Tuominen , E , Tuominiemi , J , Tuuva , T & Viinikainen , J 2020 , ' Measurement of the associated production of a Z boson with charm or bottom quark jets in proton-proton collisions at root s=13 TeV ' , Physical Review D : Particles, Fields, Gravitation and Cosmology , vol. 102 , no. 3 , 032007 . https://doi.org/10.1103/PhysRevD.102.032007

Title: Measurement of the associated production of a Z boson with charm or bottom quark jets in proton-proton collisions at root s=13 TeV
Author: The CMS collaboration; Sirunyan, A. M.; Eerola, P.; Forthomme, L.; Kirschenmann, H.; Osterberg, K.; Voutilainen, M.; Garcia, F.; Havukainen, J.; Heikkila, J. K.; Karimäki, V.; Kim, M.; Kinnunen, R.; Lampen, T.; Lassila-Perini, K.; Laurila, S.; Lehti, S.; Linden, T.; Luukka, P.; Maenpaa, T.; Siikonen, H.; Tuominen, E.; Tuominiemi, J.; Tuuva, T.; Viinikainen, J.
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, 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
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, University of Illinois, Chicago
Date: 2020-08-19
Language: eng
Number of pages: 29
Belongs to series: Physical Review D : Particles, Fields, Gravitation and Cosmology
ISSN: 1550-7998
URI: http://hdl.handle.net/10138/322036
Abstract: Ratios of cross sections, sigma(Z + c jets)/sigma(Z + jets), sigma(Z + b jets)/sigma(Z + jets), and sigma(Z + c jets)/sigma(Z + b jets) in the associated production of a Z boson with at least one charm or bottom quark jet are measured in proton-proton collisions at root s = 13 TeV. The data sample, collected by the CMS experiment at the CERN LHC, corresponds to an integrated luminosity of 35.9 fb(-1), with a fiducial volume of p(T) > 30 GeV and vertical bar eta vertical bar <2.4 for the jets, where p(T) and eta represent transverse momentum and pseudorapidity, respectively. The Z boson candidates come from leptonic decays into electrons or muons with p(r) > 25 GeV and vertical bar eta vertical bar <2.4, and the dilepton mass satisfies 71 <m(z) <111 GeV. The measured values are sigma(Z + c jets)/sigma(Z + jets) = 0.102 +/- 0.002 +/- 0.009, sigma(Z + b jets)/6(Z + jets) = 0.0633 +/- 0.0004 +/- 0.0015, and sigma(Z + c jets)/sigma(Z + b jets) = 1.62 +/- 0.03 +/- 0.15. Results on the inclusive and differential cross section ratios as functions of jet and Z boson transverse momentum are compared with predictions from leading and next-to-leading order perturbative quantum chromodynamics calculations. These arc the first measurements of the cross section ratios at 13 TeV.
Subject: 114 Physical sciences
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