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 -1 recorded with the CMS detector at the LHC. The cross section is measured inclusively, as well as separately for top (t) and antitop t̄, in final states with a muon or an electron. The measured inclusive t-channel cross section is σ t-ch. = 83.6 ± 2.3 (stat.) ± 7.4 (syst.) pb. The single t and t̄ cross sections are measured to be σ t-ch.(t) = 53.8 ± 1.5 (stat.) ± 4.4 (syst.) pb and σ t-ch. t̄= 27.6 ± 1.3 (stat.) ± 3.7 (syst.) pb, respectively. The measured ratio of cross sections is R t-ch. = σ t-ch.(t)/σ t-ch. t̄ = 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 tb is extracted and, in combination with a previous CMS result at √S = 7 TeV, a value |V tb| = 0.998 ± 0.038 (exp.) ± 0.016 (theo.) is obtained. [Figure not available: see fulltext.] © 2014 The Author(s).

Khachatryan, V., Sirunyan, A., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., et al. (2014). Measurement of the t-channel single-top-quark production cross section and of the |Vtb| CKM matrix element in pp collisions at √S = 8 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2014(6) [10.1007/JHEP06(2014)090].

Measurement of the t-channel single-top-quark production cross section and of the |Vtb| CKM matrix element in pp collisions at √S = 8 TeV

DINARDO, MAURO EMANUELE;FIORENDI, SARA;GEROSA, RAFFAELE ANGELO;GHEZZI, ALESSIO;GOVONI, PIETRO;LUCCHINI, MARCO TOLIMAN;MANZONI, RICCARDO ANDREA;MARTELLI, ARABELLA;MARZOCCHI, BADDER;MORONI, LUIGI;PAGANONI, MARCO;RAGAZZI, STEFANO;TABARELLI DE FATIS, TOMMASO;Branca, A;De Guio, F;
2014

Abstract

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 -1 recorded with the CMS detector at the LHC. The cross section is measured inclusively, as well as separately for top (t) and antitop t̄, in final states with a muon or an electron. The measured inclusive t-channel cross section is σ t-ch. = 83.6 ± 2.3 (stat.) ± 7.4 (syst.) pb. The single t and t̄ cross sections are measured to be σ t-ch.(t) = 53.8 ± 1.5 (stat.) ± 4.4 (syst.) pb and σ t-ch. t̄= 27.6 ± 1.3 (stat.) ± 3.7 (syst.) pb, respectively. The measured ratio of cross sections is R t-ch. = σ t-ch.(t)/σ t-ch. t̄ = 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 tb is extracted and, in combination with a previous CMS result at √S = 7 TeV, a value |V tb| = 0.998 ± 0.038 (exp.) ± 0.016 (theo.) is obtained. [Figure not available: see fulltext.] © 2014 The Author(s).
Articolo in rivista - Articolo scientifico
Hadron-Hadron Scattering; Top physics; Nuclear and High Energy Physics
English
Khachatryan, V., Sirunyan, A., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., et al. (2014). Measurement of the t-channel single-top-quark production cross section and of the |Vtb| CKM matrix element in pp collisions at √S = 8 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2014(6) [10.1007/JHEP06(2014)090].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/154977
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