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Stable heavy pentaquark states

Authors:	Iain W Stewart Margaret E Wessling Mark B Wise

Institution:	^a Center for Theoretical Physics, Massachusetts Institute for Technology, Cambridge, MA 02139, USA ^b California Institute of Technology, Pasadena, CA 91125, USA

Abstract:	If the Θ⁺(1540) is interpreted as a bound state of a quark and two (ud) diquarks in a relative P-wave, then it is very likely that there exist pentaquark states with a heavy antiquark, or , and two “light” diquarks in a relative S-wave which are stable against strong decays. We make a mass estimate for exotic states of this type and discuss their weak decays. Isospin relations are constructed which test their flavor quantum numbers.

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