Measurement of differential cross sections for the production of top quark pairs and of additional jets in lepton plus jets events from pp collisions at root s=13 TeV

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2018) Measurement of differential cross sections for the production of top quark pairs and of additional jets in lepton plus jets events from pp collisions at root s=13 TeV. Physical Review D, 97 (11). pp. 1-91. ISSN 2470-0010 E-ISSN 2470-0029

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Abstract

Differential and double-differential cross sections for the production of top quark pairs in proton-proton collisions at ffiffi s p ¼ 13 TeV are measured as a function of kinematic variables of the top quarks and the top quark-antiquark (t¯t) system. In addition, kinematic variables and multiplicities of jets associated with the t¯t production are measured. This analysis is based on data collected by the CMS experiment at the LHC in 2016 corresponding to an integrated luminosity of 35.8 fb−1. The measurements are performed in the lepton þ jets decay channels with a single muon or electron and jets in the final state. The differential cross sections are presented at the particle level, within a phase space close to the experimental acceptance, and at the parton level in the full phase space. The results are compared to several standard model predictions that use different methods and approximations. The kinematic variables of the top quarks and the t¯t system are reasonably described in general, though none predict all the measured distributions. In particular, the transverse momentum distribution of the top quarks is more steeply falling than predicted. The kinematic distributions and multiplicities of jets are adequately modeled by certain combinations of next-to-leadingorder calculations and parton shower models.

Item Type:	Article (Journal)
Additional Information:	7861/70429
Uncontrolled Keywords:	Differential cross sections; Production of top quark pairs and of additional jets; Lepton plus jets events; pp collisions; root s=13 TeV
Subjects:	Q Science > Q Science (General) Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science Kulliyyah of Science > Department of Physics
Depositing User:	Dr Mohd Adli MD Ali
Date Deposited:	04 Feb 2019 09:23
Last Modified:	15 Jul 2019 09:29
URI:	http://irep.iium.edu.my/id/eprint/70429

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