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Measurement of jet multiplicity distributions in $t\bar{t}$⎯ production in $pp$ collisions at $\sqrt{s}$=7TeV


CMS Collaboration; Canelli, M F; Chiochia, V; Kilminster, B; Robmann, P; et al (2014). Measurement of jet multiplicity distributions in $t\bar{t}$⎯ production in $pp$ collisions at $\sqrt{s}$=7TeV. European Physical Journal C - Particles and Fields, 74:3014.

Abstract

The normalised differential top quark-antiquark production cross section is measured as a function of the jet multiplicity in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC with the CMS detector. The measurement is performed in both the dilepton and lepton+jets decay channels using data corresponding to an integrated luminosity of 5.0 fb−1 . Using a procedure to associate jets to decay products of the top quarks, the differential cross section of the tt⎯ production is determined as a function of the additional jet multiplicity in the lepton+jets channel. Furthermore, the fraction of events with no additional jets is measured in the dilepton channel, as a function of the threshold on the jet transverse momentum. The measurements are compared with predictions from perturbative quantum chromodynamics and no significant deviations are observed.

The normalised differential top quark-antiquark production cross section is measured as a function of the jet multiplicity in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC with the CMS detector. The measurement is performed in both the dilepton and lepton+jets decay channels using data corresponding to an integrated luminosity of 5.0 fb−1 . Using a procedure to associate jets to decay products of the top quarks, the differential cross section of the tt⎯ production is determined as a function of the additional jet multiplicity in the lepton+jets channel. Furthermore, the fraction of events with no additional jets is measured in the dilepton channel, as a function of the threshold on the jet transverse momentum. The measurements are compared with predictions from perturbative quantum chromodynamics and no significant deviations are observed.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Date:2014
Deposited On:24 Feb 2015 14:24
Last Modified:27 May 2016 16:15
Publisher:Springer
ISSN:1434-6044
Publisher DOI:https://doi.org/10.1140/epjc/s10052-014-3014-0
Permanent URL: https://doi.org/10.5167/uzh-108350

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