On a possible tetraquark cousin of the Theta^+

Details On a possible tetraquark cousin of the Theta^+ On a possible tetraquark cousin of the Theta^+

2004-11-10

arxiv.org/abs/hep-ph/0411136v2

Phys.Lett. B612 (2005) 197-200

Physics

High Energy Physics

High Energy Physics - Phenomenology

Expanded discussion of allowed and forbidden decay modes

Scientific paper

10.1016/j.physletb.2005.03.038

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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