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Search for anomalous Wtb couplings and avour-changing neutral currents in t-channel single top quark production in pp collisions at p s = 7 and 8 TeV
dc.contributor.author | CMS Collaboration | |
dc.date.accessioned | 2018-10-18T17:11:26Z | |
dc.date.available | 2018-10-18T17:11:26Z | |
dc.date.issued | 2017-02 | |
dc.identifier.citation | The CMS collaboration, Khachatryan, V., Sirunyan, A.M. et al. J. High Energ. Phys. (2017) 2017: 28. https://doi.org/10.1007/JHEP02(2017)028 | en_US |
dc.identifier.uri | http://hdl.handle.net/1808/26859 | |
dc.description.abstract | Single 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 |f V R | < 0.16, |f T L | < 0.057, and − 0.049 < f T R < 0.048, respectively. For the FCNC couplings κ tug and κ tcg, the 95% CL upper limits on coupling strengths are |κ tug|/Λ < 4.1 × 10− 3 TeV−1 and |κ tcg|/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. | |
dc.publisher | Springer Verlag | en_US |
dc.rights | © The Author(s) 2017 | en_US |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_US |
dc.subject | Flavour Changing Neutral Currents | en_US |
dc.subject | Hadron-Hadron scattering (experiments) | en_US |
dc.subject | Top physics | en_US |
dc.title | Search for anomalous Wtb couplings and avour-changing neutral currents in t-channel single top quark production in pp collisions at p s = 7 and 8 TeV | en_US |
dc.type | Article | en_US |
kusw.kuauthor | Baringer, Philip, S. | |
kusw.kudepartment | Physics and Astronomy | en_US |
dc.identifier.doi | https://doi.org/10.1007/JHEP02(2017)028 | en_US |
kusw.oaversion | Scholarly/refereed, publisher version | en_US |
kusw.oapolicy | This item meets KU Open Access policy criteria. | en_US |
dc.rights.accessrights | openAccess | en_US |