M.Ahmadi

Rare Exclusive Top Decays t , b M and Vector-Meson Helicity

We present a leading-order study of the rare exclusive decays $t \to bM$, where $M$ denotes a pseudoscalar or vector meson. Starting from the tree-level transition $t \to bW^* \to b(q\bar q')$ and using a factorization approximation, we derive compact expressions for the amplitudes and partial widths in which the long-...