Measurement of Jet Multiplicity Distributions in t[bar over t] Production in pp Collisions at √s = 7 TeV
Author(s)
Apyan, Aram; Gauer, Gerry P.; Busza, Wit; Cali, Ivan Amos; Chan, M.; Di Matteo, Leonardo; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Gulhan, Doga Can; Klute, Markus; Lai, Yue Shi; Ma, Teng; Paus, Christoph M. E.; Ralph, Duncan Kelley; Stephans, George S. F.; Velicanu, Dragos Alexandru; Veverka, Jan; Wyslouch, Boleslaw; Yoon, A. S.; Zanetti, Marco; Barbieri, Richard Alexander; Dutta, Valentina; Levin, Andrew Michael; Roland, Gunther M; Stoeckli, Fabian; Wyslouch, Victoria; Lee, Yen-Jie; Luckey Jr, P David; Roland, Christof E; Sumorok, Konstanty C; Yang, Mingming; Bauer, Gerry P; ... Show more Show less
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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[superscript −1]. Using a procedure to associate jets to decay products of the top quarks, the differential cross section of the t[bar over t] 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.
Date issued
2014-08Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science; Massachusetts Institute of Technology. School of ScienceJournal
The European Physical Journal C
Publisher
Springer-Verlag
Citation
Chatrchyan, S., V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, et al. “Measurement of Jet Multiplicity Distributions in t[bar over t] Production in pp Collisions at √s = 7 TeV.” Eur. Phys. J. C 74, no. 8 (August 2014). © CERN for the benefit of the CMS collaboration
Version: Final published version
ISSN
1434-6044
1434-6052