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; Barbieri, R.; Bauer, Gerry P.; Bauer, Gerry P.; Busza, Wit; Cali, Ivan Amos; Chan, M.; Di Matteo, Leonardo; Dutta, V.; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Gulhan, Doga Can; Klute, Markus; Lai, Yue Shi; Lee, Y.-J.; Levin, A.; Luckey, P. David, Jr.; Ma, Teng; Paus, Christoph M. E.; Ralph, Duncan Kelley; Roland, Christof E.; Roland, Gunther M.; Stephans, George S. F.; Stockli, Fabian; Sumorok, Konstanty C.; Velicanu, Dragos Alexandru; Veverka, Jan; Wyslouch, Boleslaw; Yang, M.; Zanetti, Marco; Zhukova, Victoria; ... Show more Show less
MetadataShow full item record
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.
DepartmentMassachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science; Massachusetts Institute of Technology. School of Science
Journal of High Energy Physics
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
Final published version