Stable Heavy Pentaquark States

Abstract

If the Theta^+(1540) is interpreted as a bound state of a $\bar{s}$ quark and two (ud) diquarks in a relative P-wave, then it is very likely that there exist pentaquark states with a heavy antiquark, $\bar{b}$ or $\bar{c}$, 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.

Comments: 8 pages