Isgur-Wise function in $B_c$ decays to charmonium with the Bethe-Salpeter method

Zi-Kan Geng, Yue Jiang, Tianhong Wang +2

The Isgur-Wise function vastly reduces the weak-decay form factors of hadrons containing one heavy quark. In this paper, we extract the Isgur-Wise functions from the instantaneous…