Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comment on "A possible explanation of the D0 like-sign dimuon charge
  aymmetry"   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 $b \to c \ell \nu$, vanishes.

21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat