CP violation in (B)over-bar0 → D*+μ-(v)over-barμ

In order to explain the observed anomalies in the measurements of R-D(*) and R-J/psi, a variety of new-physics (NP) models that contribute to b -> c(T)(-)(v) over bar have been proposed. In this paper, we show how CP-violating observables can be used to distinguish these NP models. Because (p) over right arrow (T) cannot be measured (the decay products of the T include the undetected v(T)), obtaining the angular distribution of (B) over bar (0) -> D*(+) T-(v) over bar (T) is problematic. Instead, we focus here on (B) over bar (0) -> D*(+)(-> D-0 pi(+))mu(-)(v) over bar (mu). This process may also receive contributions from the same NP, and LHCb intends to measure the CP-violating angular asymmetries in this decay. There are two classes of NP models that contribute to b -> c mu(-)(v) over bar (mu). These involve (i) a W 0 (two types) or (ii) a leptoquark (LQ) (six types). The most popular NP models predict no CP-violating e ff ects, so the measurement of nonzero CP-violating asymmetries would rule them out. Furthermore these measurements allow one to distinguish the W 0 and LQ models, and to di ff erentiate among several LQ models.