With a sample of 232×106 Υ(4S)→B¯¯¯B events collected with the BABAR detector, we study the decay B+→p¯pK+ excluding charmonium decays to p¯p. We measure a branching fraction B(B+→p¯pK+)=(6.7±0.5±0.4)×10−6. An enhancement at low p¯p mass is observed and the Dalitz plot asymmetry suggests dominance of the penguin amplitude in this B decay. We search for a pentaquark candidate Θ*++ decaying into pK+ in the mass range 1.43 to 2.00 GeV/c2 and set limits on B(B+→Θ*++¯p)×B(Θ*++→pK+) at the 10−7 level.
|Journal||Physical Review D|
|Publication status||Published - 6 Sep 2005|