Comment on A possible explanation of the D0 like-sign dimuon charge aymmetry
نشر في Michael Gronau
بتاريخ 2015
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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 $b to c ell u$, vanishes.