Search for anomalous single top quark production in association with a photon in pp collisions at sqrt(s) = 8 TeV

CMS Collaboration, Shimaa Abu Zeid, Freya Blekman, Jorgen D'Hondt, Nadir Daci, Isabelle Helena De Bruyn, Kevin Deroover, Natalie Heracleous, James Keaveney, Steven Lowette, Lieselotte Moreels, Annik Olbrechts, Quentin Python, Derek Strom, Stefaan Tavernier, Walter Van Doninck, Petra Van Mulders, Gerrit Van Onsem, Isis Marina Van Parijs

Research output: Contribution to journalArticle

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Abstract

The result of a search for flavor changing neutral currents (FCNC) through single top quark production in association with a photon is presented. The study is based on proton-proton collisions at a center-of-mass energy of 8 TeV using data collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 19.8 inverse femtobarns. The search for t gamma events where t to Wb and W to mu nu is conducted in final states with a muon, a photon, at least one hadronic jet with at most one being consistent with originating from a bottom quark, and missing transverse momentum. No evidence of single top quark production in association with a photon through a FCNC is observed. Upper limits at the 95% confidence level are set on the tu gamma and tc gamma anomalous couplings and translated into upper limits on the branching fraction of the FCNC top quark decays: B(t to u gamma)
Original languageEnglish
Article number035
Number of pages37
JournalThe Journal of high energy physics
Volume2016
Issue number04
DOIs
Publication statusPublished - 6 Apr 2016

Bibliographical note

Replaced with published version. Added journal reference and DOI. All figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-14-003/index.html

Keywords

  • hep-ex

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