Measuring anomalous WW and t couplings using top plus production at the LHC

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) as well as the triple gauge-boson couplings (WW). The study is based on the modifications of the t and WW 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 and WW couplings. It is shown that the proposed angular asymmetry can distinguish anomalous t, WW couplings from the standard model prediction and yield a great sensitivity.