Article révisé par les pairs
| Résumé : | Single top quark production is a powerful process to search for new physics signs. In this work we propose and investigate a search for top quark flavor-changing neutral currents (FCNCs) via a photon using direct single top quark production events in proton-proton collisions at the LHC at CERN. We show that the direct single top quark final state can provide constraints on the strengths of top-quark-γ and top-quark-gluon FCNC couplings simultaneously. Results of a search for direct single top quark production at the LHC at a center-of-mass energy of 8 TeV performed by the ATLAS Collaboration are used to set first experimental limits on the anomalous FCNC top decay branching fractions B(tâuγ)<0.05% and B(tâcγ)<0.14% via direct single top quark production. Finally, the sensitivity of the proposed channel for probing the top-quark-γ couplings at 13 TeV is presented. © 2017 American Physical Society. |
