Comment on "A possible explanation of the D0 like-sign dimuon charge aymmetry"

Abstract

We show that a contribution due to a second order amplitude with intermediate $\bar u d$ in a loop, which was claimed by Descotes-Genon and Kamenik to dominate the CP asymmetry in $b \to c \ell ν$, vanishes.

2 pages, submitted as a Comment to Physical Review D