Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evolution of the $B$-Meson Light-Cone Distribution Amplitude in Laplace
  Space   The $B$-meson light-cone distribution amplitude is a central quantity
governing non-perturbative hadronic dynamics in exclusive $B$ decays. We show
that the information needed to describe such processes at leading power in
$\Lambda_{\rm QCD}/m_b$ is most directly contained in its Laplace transform
$\tilde\phi_+(\eta)$. We derive the renormalization-group (RG) equation
satisfied by this function and present its exact solution. We express the
RG-improved QCD factorization theorem for the decay $B^-\to\gamma\ell^-\bar\nu$
in terms of $\tilde\phi_+(\eta)$ and show that it is explicitly independent of
the factorization scale. We propose an unbiased parameterization of
$\tilde\phi_+(\eta)$ in terms of a small set of uncorrelated hadronic
parameters.

2
The categories of this paper are: math
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc