Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Probing the mass degeneracy of particles with different spins   The spin is an important property of a particle. Although it is unlikely to
happen, there is still a possibility that two particle with different spins
share similar masses. In this paper, we propose a method to probe this kind of
mass degeneracy of particles with different spins. We will use the cascade
decay $B^+\to X(3872)K^+$, $X(3872)\to D^+D^-$ to explain our method. It can be
seen that the possible mass degeneracy of $X(3872)$ can lead interesting
behavior in the corresponding cascade decay.

6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn