Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Isospin and a possible interpretation of the newly observed X(1576)   Recently, the BES collaboration observed a broad resonant structure X(1576)
with a large width being around 800 MeV and assigned its $J^{PC}$ number to
$1^{--}$. We show that the isospin of this resonant structure should be
assigned to 1. This state might be a molecule state or a tetraquark state. We
study the consequences of a possible $K^*(892)$-${\bar \kappa}$ molecular
interpretation. In this scenario, the broad width can easily be understood. By
using the data of $B(J/\psi\to X\pi^0)\cdot B(X\to K^+K^-)$, the branching
ratios $B(J/\psi\to X\pi^0)\cdot B(X\to \pi^+\pi^-)$ and $B(J/\psi\to
X\pi^0)\cdot B(X\to K^+K^-\pi^+\pi^-)$ are further estimated in this molecular
state scenario. It is shown that the $X\to \pi^+\pi^-$ decay mode should have a
much larger branching ratio than the $X\to K^+K^-$ decay mode has. As a
consequence, this resonant structure should also be seen in the $J/\psi\to
\pi^+\pi^-\pi^0$ and $J/\psi\to K^+K^-\pi^+\pi^-\pi^0$ processes, especially in
the former process. Carefully searching this resonant structure in the
$J/\psi\to \pi^+\pi^-\pi^0$ and $J/\psi\to K^+K^-\pi^+\pi^-\pi^0$ decays should
be important for understanding the structure of X(1567).

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The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
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The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
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The categories of this paper are: econ
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The categories of this paper are: nlin
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an