2014/03/31 by V. Khachatryan, CMS Collaboration, A. M. Sirunyan +98 · 4 citations
Physics and Astronomy · #Bar (unit) #Cabibbo–Kobayashi–Maskawa matrix #Geometry #High-Energy Particle Collisions Research #Inverse #Large Hadron Collider #Muon #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Production (economics) #Quantum Chromodynamics and Particle Interactions #Quark #Sigma #Top quark #hep-ex
paper · pdf · doi:10.1007/jhep06(2014)090
published as JHEP 06 (2014) 090 · Replaced with published version. Added journal reference and DOI
openalex publication_date 2014/06/01 · arxiv created 2014/07/07 · arxiv updated 2014/07/08 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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 (t), in final states with a muon or an electron. The measured inclusive tchannel cross section is t-ch. = 83.6 2.3 (stat.) 7.4 (syst.) pb. The single t and t cross sections are measured to be t-ch. (t) = 53.8 1.5 (stat.) 4.4 (syst.) pb and t-ch. (t) = 27.6 1.3 (stat.) 3.7 (syst.) pb, respectively. The measured ratio of cross sections is R t-ch. = t-ch. (t)/ t-ch. (t) = 1.950.10 (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.