Rare Top Decays in Minimal and Non-minimal Universal Extra Dimension

Understand

The flavour changing decays of the top quark are severely suppressed in the Standard Model by virtue of the Glashow-Iliopoulos-Maiani mechanism.

• Many beyond Standard Model extensions predict the decay rates at a level that is observable in the LHC.
• We perform a complete one-loop calculation of the flavour changing top quark decays $t\to c\gamma$ and $t\to ch$ in the universal extra dimensional model.
• Apart from considering the decay rates in the minimal version of the model, we also calculate the rates in the non-minimal scenario where the presence of boundary localised terms interestingly modify the set-up.