Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Short-distance RG-analysis of $X(3872)$ radiative decays   We present a renormalization-group analysis of the $X(3872)$ radiative decays
into $J/ \psi \gamma$ and $\psi(2S) \gamma$. We assume a $D\bar{D}^{*}$
molecule for the $X$ long-distance structure and parametrize its short-distance
physics as contact interactions. Using effective field theory techniques and
power-divergence subtraction scheme, we find that short- and long-distance
physics are equally important in these decays. Our calculations set a lower
limit to the corresponding decay widths, which can in principle be tested
experimentally. Our results may be used as guide to build models for the $X$
short-distance.

32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex