On a possible tetraquark cousin of the Theta^+

Abstract

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.

Expanded discussion of allowed and forbidden decay modes

References in corpus (5)

• Evidence for a narrow |S|=1 baryon state at a mass of 1528 MeV in quasi-real photoproduction
• A Diquark-Triquark Model for the KN Pentaquark
• Search for Theta(1540)^+ in exclusive proton-induced reaction p+C(N) \to Theta^+ \bar{K}^0 + C(N) at the energy of 70 GeV
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Cited by in corpus (8)

• Search for the Z(4430)^- at BABAR
• Glueball nature of the sigma/f_0(600) from pi-pi and gamma-gamma scatterings
• Exotic Tetraquark ud bar[s] bar[s] of J^P=0^+ in the QCD Sum Rule
• The sigma and f_0(980) from Ke4 + pi-pi scatterings data
• The $J^P=1^{+}$ $ud\bar{s}\bar{s}$ Tetraquark
• Axial vector tetraquark with S=+2
• Search for a promising tetraquark candidate $X(ud\bar{s}\bar{s})$ in $pn\to \Lambda \Lambda X$
• Low-lying ud anti-s anti-s configurations in a non-relativistic constituent quark model