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Measurement of the integrated and differential t ¯ t production cross sections for high-pT top quarks in pp collisions at √s=8  TeV

Measurement of the integrated and differential t ¯ t production cross sections for high-pT top quarks in pp collisions at √s=8  TeV
Measurement of the integrated and differential t ¯ t production cross sections for high-pT top quarks in pp collisions at √s=8  TeV
The cross section for pair production of top quarks (t ¯ t) with high transverse momenta is measured in pp collisions, collected with the CMS detector at the LHC with √s=8  TeV in data corresponding to an integrated luminosity of 19.7  fb−1. The measurement is performed using lepton+jets events, where one top quark decays semileptonically, while the second top quark decays to a hadronic final state. The hadronic decay is reconstructed as a single, large-radius jet, and identified as a top quark candidate using jet substructure techniques. The integrated cross section and the differential cross sections as a function of top quark pT and rapidity are measured at particle level within a fiducial region related to the detector-level requirements and at parton level. The particle-level integrated cross section is found to be σt ¯ t=0.499±0.035(stat+syst)±0.095(theo)±0.013(lumi)  pb for top quark pT>400  GeV. The parton-level measurement is σt ¯ t=1.44±0.10(stat+syst)±0.29(theo)±0.04(lumi)  pb. The integrated and differential cross section results are compared to predictions from several event
2470-0010
072002
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

Khachatryan, Vardan and Belyaev, Alexander (2016) Measurement of the integrated and differential t ¯ t production cross sections for high-pT top quarks in pp collisions at √s=8  TeV. Physical Review D, D94 (7), 072002. (doi:10.1103/PhysRevD.94.072002).

Record type: Article

Abstract

The cross section for pair production of top quarks (t ¯ t) with high transverse momenta is measured in pp collisions, collected with the CMS detector at the LHC with √s=8  TeV in data corresponding to an integrated luminosity of 19.7  fb−1. The measurement is performed using lepton+jets events, where one top quark decays semileptonically, while the second top quark decays to a hadronic final state. The hadronic decay is reconstructed as a single, large-radius jet, and identified as a top quark candidate using jet substructure techniques. The integrated cross section and the differential cross sections as a function of top quark pT and rapidity are measured at particle level within a fiducial region related to the detector-level requirements and at parton level. The particle-level integrated cross section is found to be σt ¯ t=0.499±0.035(stat+syst)±0.095(theo)±0.013(lumi)  pb for top quark pT>400  GeV. The parton-level measurement is σt ¯ t=1.44±0.10(stat+syst)±0.29(theo)±0.04(lumi)  pb. The integrated and differential cross section results are compared to predictions from several event

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e-pub ahead of print date: 12 October 2016
Published date: 12 October 2016
Organisations: Physics & Astronomy

Identifiers

Local EPrints ID: 408266
URI: http://eprints.soton.ac.uk/id/eprint/408266
ISSN: 2470-0010
PURE UUID: bfe8986d-fa33-47fa-a84c-35c7b2717509
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

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Date deposited: 18 May 2017 04:02
Last modified: 22 Nov 2021 02:55

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Author: Vardan Khachatryan

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