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|Paper IPM / Particles / 14567||
We consider the electroweak production of a top quark in association with a photon at the LHC to probe the electroweak top quark couplings (t―tγ) as well as the triple gauge boson couplings (WWγ).
The study is based on the modifications of the t―tγ and WWγ interactions
via heavy degrees of freedom in the form of dimension-six operators which we add to the standard model Lagrangian.
A binned angular asymmetry in single top quark plus photon events and cross section ratio are proposed to probe the anomalous t―tγ and WWγ
couplings. It is shown that the proposed angular asymmetry can distinguish anomalous t―tγ, WWγ couplings from the standard model prediction and yield a great sensitivity.
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