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On a possible tetraquark cousin of the Theta^+

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arxiv hep-ph/0411136 v2 pith:7AOYOZXE submitted 2004-11-10 hep-ph

On a possible tetraquark cousin of the Theta^+

classification hep-ph
keywords likelymesontetraquarkthetatriquarkallowedantiquarkbind
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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If a narrow Theta^+ pentaquark exists, it is likely that a ud\bar s-ud triquark-diquark configuration is a significant component of its wave function. If so, the mechanism responsible for the binding of a triquark and a diquark is also likely to bind the triquark to an \bar s antiquark. We discuss the expected properties of such a ud\bar s-\bar s tetraquark meson. In particular, we point out that for a 0^+ isoscalar ud\bar s\bar s meson the lowest allowed decay mode is a four-body K K pi pi channel with a small phase space and a distinctive experimental signature.

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