Speaker
Dr
Masaya Kohda
(Chung-Yuan Christian University)
Description
With a large amount of top and anti-top quarks produced at the LHC, rare top quark decays offer a nice probe to search for physics beyond the standard model. In this talk, I will discuss about a flavor-changing neutral current (FCNC) decay of the top quark by emitting a new massive gauge boson Z', namely, t --> c Z', based on a model of gauged L_mu - L_tau (the difference between the muon and tauon numbers). This Z' boson is motivated by the anomalous data in the angular distribution of the B --> K^* mu^+ mu^- decay observed by LHCb, as well as the long-standing muon g-2 anomaly. Taking into account various constraints on the model, especially from rare B and K meson decay data, I will illustrate whether the t --> c Z' branching ratio can be as large as an observable level at the LHC. I will also discuss about collider phenomenology of a new Higgs boson phi for the gauged L_mu - L_tau symmetry breaking, which may show up in a FCNC decay t --> c phi, followed by phi --> Z'Z' --> 4mu.
Primary author
Dr
Masaya Kohda
(Chung-Yuan Christian University)
