Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Photoproduction of hidden-charm states in the $\gamma p \to \bar{D}^{*0}
  \Lambda^+_c$ reaction near threshold   We report on a theoretical study of the hidden charm $N^*_{c \bar{c}}$ states
in the $\gamma p \to \bar{D}^{*0} \Lambda^+_c$ reaction near threshold within
an effective Lagrangian approach. In addition to the contributions from the
$s$-channel nucleon pole, the $t$-channel $D^0$ exchange, the $u$-channel
$\Lambda^+_c$ exchange and the contact term, we study the contributions from
the $N^*_{c \bar{c}}$ states with spin-parity $J^P = 1/2^-$ and $3/2^-$. The
total and differential cross sections of the $\gamma p \to \bar{D}^{*0}
Lambda^+_c$ reaction are predicted. It is found that the contributions of these
$N^*_{c \bar{c}}$ states give clear peak structures in the total cross
sections. Thus, this reaction is another new platform to study the hidden-charm
states. It is expected that our model calculation may be tested by the future
experiments.

24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio