Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Review on the inclusive rare decays B -> X_s gamma and B -> X_d gamma in
  the Standard Model   We review the NLL QCD calculations for the branching ratio of B -> X_s gamma
in the SM. In particular, we emphasize the problem related to the definition of
the charm quark mass which leads to a rather large uncertainty of the NLL
predictions. The various steps needed for a NNLL calculation, in which the m_c
issue can be settled, is also sketched. We briefly summarize the results of a
calculation of the O(alpha_s^2 n_f) corrections to BR(B -> X_s gamma), which
was recently performed as a first step in the NNLL program. We then also
briefly review the status of the photon energy spectrum and show the comparison
with experimental data. Finally, we review the status of the CKM suppressed
decay mode B -> X_d gamma.

34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con