Extra gauge bosons and lepton flavor universality violation in ${\rm Y}$ and $B$ meson decays

Cristian H. García-Duque, J. H. Muñoz, Néstor Quintero +1

Lepton flavor universality can be tested through the ratio of semileptonic $B$ meson decays and leptonic ${\rm Y}$ meson decays, with ${\rm Y}\equiv {\rm Y}(nS)$ ($n=1,2,3$). For the charged-current…