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Search for anomalous Wtb couplings and flavour-changing neutral currents in t-channel single top quark production in pp collisions at √s=7 and 8 TeVKhachatryan, V.Sirunyan, A.M.Tumasyan, A.Adam, W.Asilar, E.Bergauer, T.Brandstetter, J.Brondolin, E.Dragicevic, M.Erö, J.Flechl, M.Friedl, M.Frühwirth, R.Ghete, V.M.Hartl, C.Hörmann, N.Hrubec, J.Jeitler, M.König, A.Krätschmer, I.Liko, D.Matsushita, T.Mikulec, I.Rabady, D.Rad, N.Rahbaran, B.Rohringer, H.Schieck, J.Strauss, J.Treberer-Treberspurg, W.Waltenberger, W.Wulz, C.-E.Mossolov, V.Shumeiko, N.Suarez Gonzalez, J.Alderweireldt, S.De Wolf, E.A.Janssen, X.Lauwers, J.Van De Klundert, M.Van Haevermaet, H.Van Mechelen, P.Van Remortel, N.Van Spilbeeck, A.Abu Zeid, S.Blekman, F.D’Hondt, J.Daci, N.De Bruyn, I.Deroover, K.Flavour Changing Neutral CurrentsHadron-Hadron scattering (experiments)Top physicsSingle top quark events produced in the t channel are used to set limits on anomalous Wtb couplings and to search for top quark flavour-changing neutral current (FCNC) interactions. The data taken with the CMS detector at the LHC in proton-proton collisions at s=7 and 8 TeV correspond to integrated luminosities of 5.0 and 19.7 fb−1, respectively. The analysis is performed using events with one muon and two or three jets. A Bayesian neural network technique is used to discriminate between the signal and backgrounds, which are observed to be consistent with the standard model prediction. The 95% confidence level (CL) exclusion limits on anomalous right-handed vector, and left- and right-handed tensor Wtb couplings are measured to be |fV R| < 0.16, |fT L| < 0.057, and − 0.049 < fT R < 0.048, respectively. For the FCNC couplings κtug and κtcg, the 95% CL upper limits on coupling strengths are |κtug|/Λ < 4.1 × 10− 3 TeV−1 and |κtcg|/Λ < 1.8 × 10− 2 TeV−1, where Λ is the scale for new physics, and correspond to upper limits on the branching fractions of 2.0 × 10−5 and 4.1 × 10−4 for the decays t → ug and t → cg, respectively.[Figure not available: see fulltext.] © 2017, The Author(s).Springer Science and Business Media Deutschland GmbH2017Articlehttps://rdlopen.rawdatalibrary.net/r/ebyu/14621https://doi.org/10.1007/jhep02(2017)0281029-8479enJournal of High Energy Physicsinfo:eu-repo/semantics/openAccessinfo:eu-repo/semantics/articlehttps://ebyu-rdlopen.rawdatalibrary.net/tr/items/ebyu/14621