Study of the underlying event in top quark pair production in [Formula omitted] collisions at 13[Formula omitted]

Measurements of normalized differential cross sections as functions of the multiplicity and kinematic variables of charged-particle tracks from the underlying event in top quark and antiquark pair production are presented. The measurements are performed in proton-proton collisions at a center-of-mas...

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Bibliographic Details
Published inThe European physical journal. C, Particles and fields Vol. 79; no. 2; pp. 1 - 49
Main Authors Sirunyan, A. M, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J
Format Journal Article
LanguageEnglish
Published Heidelberg Springer 07.02.2019
Springer Nature B.V
Subjects
Charged particles
Large Hadron Collider
Luminosity
Mathematical analysis
Nuclear energy
Pair production
Particle collisions
Particle tracking
Quarks
Solenoids
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Summary:Measurements of normalized differential cross sections as functions of the multiplicity and kinematic variables of charged-particle tracks from the underlying event in top quark and antiquark pair production are presented. The measurements are performed in proton-proton collisions at a center-of-mass energy of 13 [Formula omitted], and are based on data collected by the CMS experiment at the LHC in 2016 corresponding to an integrated luminosity of 35.9 [Formula omitted]. Events containing one electron, one muon, and two jets from the hadronization and fragmentation of [Formula omitted] quarks are used. These measurements characterize, for the first time, properties of the underlying event in top quark pair production and show no deviation from the universality hypothesis at energy scales typically above twice the top quark mass.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-019-6620-z