Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spectroscopy of $\mathbf{B_c}$ mesons and the possibility of finding
  exotic $\mathbf{B_c}$-like structures   The bottom-charmed ($B_c$) mesons are more stable than their charmonium
($c\bar c$) and bottomium ($b\bar b$) partners because they cannot annihilate
into gluons. However, the low production cross-sections and
signal-to-background ratios avoided until now their clear identification. The
recent experimental results reported by CMS and LHCb at CERN open the
possibility of having a $B_c$ spectrum as complete as the ones of charmonium
and bottomonium. Motivated by this expectation, we compute bottom-charmed meson
masses in the region energies in which decay meson-meson thresholds are opened,
looking for the analogs to the $X(3872)$ in the $B_c$ spectroscopy. We use a
constituent quark model in which quark-antiquark degrees of freedom are
complemented by four-body Fock states configurations. The model has been
applied to a wide range of hadronic observables, in particular to the
$X(3872)$, and thus the model parameters are completely constrained. No extra
states are found in the $J^P=0^+$ and $J^P=1^+$ sectors. However, in the
$J^P=2^+$ sector we found an additional state very close to the $D^*B^*$
threshold which could be experimentally detected.

17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg