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 organization: Department of Physics
Helsinki Institute of Physics
Date: 2020-08-19
Language: eng
Number of pages: 29
Belongs to series: Physical Review D : Particles, Fields, Gravitation and Cosmology
ISSN: 1550-7998
DOI: https://doi.org/10.1103/PhysRevD.102.032007
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
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion


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