The Decay constants of $B_c(nS)$ and $B_c^{\ast }(nS)$

Chao Sun, Ru-Hui Ni, Muyang Chen

The decay constants of the low lying S-wave $B_c$ mesons, i.e. $B_c(nS)$ and $B_c^{\ast }(nS)$ with $n\le 3$, are calculated in the nonrelativistic quark model. The running coupling of…