Measurement of the integrated and differential t[bar over t] production cross sections for high- pT top quarks in pp collisions at √s = 8 TeV
Author(s)
Apyan, Aram; Barbieri, Richard Alexander; Baty, Austin Alan; Bi, Ran; Bierwagen, Katharina; Brandt, Stephanie Akemi; Busza, Wit; Cali, Ivan Amos; Demiragli, Zeynep; Di Matteo, Leonardo; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Gulhan, Doga Can; Hsu, Dylan George; Iiyama, Yutaro; Innocenti, Gian Michele; Klute, Markus; Kovalskyi, Dmytro; Krajczar, Krisztian F.; Lai, Yue Shi; Lee, Yen-Jie; Levin, Andrew Michael; Luckey Jr, P David; Marini, Andrea Carlo; McGinn, Christopher Francis; Mironov, Camelia Maria; Narayanan, Siddharth Madhavan; Niu, Xinmei; Paus, Christoph M. E.; Roland, Christof E; Roland, Gunther M; Salfeld-Nebgen, Jakob Maxillian Henry; Stephans, George S. F.; Sumorok, Konstanty C; Tatar, Kaya; Varma, Mukund Madhav; Velicanu, Dragos Alexandru; Veverka, Jan; Wang, J.; Wang, Ta-Wei; Wyslouch, Boleslaw; Yang, Mingming; Wyslouch, Victoria; ... Show more Show less
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Alternative title
Measurement of the integrated and differential t ¯ t production cross sections for high- pT top quarks in pp collisions at √s = 8 TeV
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The cross section for pair production of top quarks (t[bar over t]) with high transverse momenta is measured in p collisions, collected with the CMS detector at the LHC with √s = 8 TeV in data corresponding to an integrated luminosity of 19.7 fb [superscript -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 σ[subscript t[bar over 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 σ[subscript t[bar over 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 generators.
Date issued
2016-10Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Physical Review D
Publisher
American Physical Society
Citation
Khachatryan, V. et al. “Measurement of the Integrated and Differential T[bar over T] Production Cross Sections for High-PT Top Quarks in P P Collisions at √S = 8 TeV.” Physical Review D 94.7 (2016): n. pag. © 2016 CERN for the CMS Collaboration
Version: Final published version
ISSN
2470-0010
2470-0029