Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: B Decays as Spectroscope for Charmed Four-quark States   The $D_s(2320)$ state recently observed by BaBar in the $D_s^+\pi^0$ channel
may be the first of a host of $cq\bar q\bar q$ four-quark states. We give a
phenomenological account of the masses and decay modes. The isosinglet
$D_s(2320)$ state is the only narrow one, dominated by the observed isospin
violating decay and less than $\sim$ 100 keV in width. All other states are
expected to decay hadronically. Notable resonances are in doubly charged
$D_s^+\pi^+$, $D^+K^+$, wrong pairing $D^+K^-$, and also $D_s^+K^-$, $D\eta$
channels. We propose B decays as searching ground for such 4-quark states,
which recoil against $\bar D^{(*)}$ meson from B decay, or $\pi^+$ $\bar
D^{(*)}$, $\bar K$ mesons from $\bar B$ decay. Exotic $qc\bar c\bar q$
charmonia could also be produced, and may be behind the slow $J/\psi$ bump in
inclusive $B\to J/\psi+X$ decay.

15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
1
The categories of this paper are: cs
16
The categories of this paper are: stat
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th