Measurement of the t-Channel Single-Top-Quark Production Cross Section and of the |V[subscript tb]| CKM Matrix Element in Pp Collisions at √s = 8 TeV
Author(s)
Apyan, Aram; Bauer, Gerry P.; Bauer, 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; Zanetti, Marco; Dutta, Valentina; Lee, Yen-Jie; Luckey Jr, P David; Roland, Christof E; Sumorok, Konstanty C; Yang, Mingming; Wyslouch, Victoria; Barbieri, Richard Alexander; Levin, Andrew Michael; Roland, Gunther M; Stoeckli, Fabian; ... Show more Show less![Thumbnail](/bitstream/handle/1721.1/89456/Khachatryan-2014-Measurement%20of%20the%20t.pdf.jpg?sequence=4&isAllowed=y)
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Measurements are presented of the t-channel single-top-quark production cross section in proton-proton collisions at √s = 8 TeV. The results are based on a data sample corresponding to an integrated luminosity of 19.7 fb[superscript −1] recorded with the CMS detector at the LHC. The cross section is measured inclusively, as well as separately for top (t) and antitop ([¯ over t]) , in final states with a muon or an electron. The measured inclusive t-channel cross section is σ [subscript t-ch.] = 83.6 ± 2.3 (stat.) ± 7.4 (syst.) pb. The single t and [¯ over t] cross sections are measured to be σ [subscript t-ch.](t) = 53.8 ± 1.5 (stat.) ± 4.4 (syst.) pb and σ [subscript t-ch.] ([¯ over t]) = 27.6 ± 1.3 (stat.) ± 3.7 (syst.) pb, respectively. The measured ratio of cross sections is R [subscript t-ch.] = σ [subscript t-ch.](t)/σ [subscript t-ch.] ([¯ over t]) = 1.95 ± 0.10 (stat.) ± 0.19 (syst.), in agreement with the standard model prediction. The modulus of the Cabibbo-Kobayashi-Maskawa matrix element V [subscript tb] is extracted and, in combination with a previous CMS result at √s = 7 TeV, a value |V [subscript tb]| = 0.998 ± 0.038 (exp.) ± 0.016 (theo.) is obtained.
Date issued
2014-06Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science; Massachusetts Institute of Technology. School of ScienceJournal
Journal of High Energy Physics
Publisher
Springer-Verlag
Citation
Khachatryan, V., A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, J. Erö, et al. “Measurement of the t-Channel Single-Top-Quark Production Cross Section and of the |V[subscript tb]| CKM Matrix Element in Pp Collisions at √s = 8 TeV.” J. High Energ. Phys. 2014, no. 6 (June 2014). © CERN, for the benefit of the CMS Collaboration
Version: Final published version
ISSN
1029-8479
1126-6708