Challenging ${\bar{B}}_{(s)}\to D_{(s)}^{(\ast )}$ Form Factors with the Heavy Quark Expansion

Marzia Bordone, Nico Gubernari, Martin Jung +1

Recent publications by three lattice QCD collaborations have provided an unprecedented wealth of theoretical predictions for the ${\bar{B}}_q\to D_q^{(\ast )}$ form factors, for spectat…