Isospin and a possible interpretation of the newly observed X(1576)

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dc.creatorGuo, Feng-Kun
dc.creatorShen, Peng-Nian
dc.date2006-06-27
dc.date2006-10-17
dc.date.accessioned2026-07-07T10:41:49Z
dc.date.available2026-07-07T10:41:49Z
dc.descriptionRecently, 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 $K^*(892)$-${\bar κ}$ molecular interpretation. In this scenario, the broad width can easily be understood. By using the data of $B(J/ψ\to Xπ^0)\cdot B(X\to K^+K^-)$, the branching ratios $B(J/ψ\to Xπ^0)\cdot B(X\to π^+π^-)$ and $B(J/ψ\to Xπ^0)\cdot B(X\to K^+K^-π^+π^-)$ are further estimated in this molecular state scenario. It is shown that the $X\to π^+π^-$ 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 $J/ψ\to π^+π^-π^0$ and $J/ψ\to K^+K^-π^+π^-π^0$ processes, especially in the former process. Carefully searching this resonant structure in the $J/ψ\to π^+π^-π^0$ and $J/ψ\to K^+K^-π^+π^-π^0$ decays should be important for understanding the structure of X(1567).
dc.description5 pages, ReVTeX4, 3 figures. Version accepted for publication as a brief report in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/hep-ph/0606273
dc.identifierhttp://arxiv.org/abs/hep-ph/0606273
dc.identifierPhys.Rev.D74:097503,2006
dc.identifierdoi:10.1103/PhysRevD.74.097503
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/181743
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.titleIsospin and a possible interpretation of the newly observed X(1576)
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