Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Revisiting nonfactorizable charm-loop effects in exclusive FCNC
  $B$-decays   We revisit the calculation of nonfactorizable corrections induced by
charm-quark loops in exclusive FCNC $B$-decays. For the sake of clarity, we
make use of a field theory with scalar particles: this allows us to focus on
the conceptual issues and to avoid technical complications related to particle
spins in QCD. We perform a straightforward calculation of the appropriate
correlation function and show that it requires the knowledge of the full
generic three-particle distribution amplitude with non-aligned arguments,
$\langle 0|\bar s(y)G_{\mu\nu}(x)b(0)|B(p)\rangle$. Moreover, the dependence of
this quantity on the variable $(x-y)^2$ is essential for a proper account of
the $\left(\Lambda_{\rm QCD}m_b/m_c^2\right)^n$ terms in the amplitudes of FCNC
$B$-decays.

20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess