Top Quark Decays into Heavy Quark Mesons

Cong-Feng Qiao, Chong Sheng Li, Kuang-Ta Chao

For top quark decays into heavy quark mesons ${\rm Y}$ and ${\bar{B}}_c^{\ast }$ , a complete calculation to the leading order both in QCD coupling constant ${\alpha }_s$ and in $v$, the typical velocit…