A Search for the Theta^*++ Pentaquark in B+ -> p pbar K+

TL;DR

This paper reports a search for the Theta*++ pentaquark in B+ decays, setting upper limits on its production rate across various mass ranges using data from the BaBar detector.

Contribution

First search for Theta*++ pentaquark in B+ decays, establishing upper limits on its branching fraction with experimental data.

Findings

No evidence of Theta*++ observed.

Upper limits on branching fractions vary by mass range.

Results are preliminary and set constraints for future searches.

Abstract

We report the results of a search for the Theta*++ pentaquark in the decay B+ -> Theta*++ pbar where Theta*++ -> pK+ using 81fb^-1 of data collected on the Upsilon(4S) resonance with the BaBar detector at PEP-II. We find an upper limit on the branching fraction of B+ -> Theta*++ pbar where Theta*++ -> pK+ to be 1.5x10^-7 for 1.43<m(Theta*++)<1.85GeV/c^2, 2.4x10^-7 for 1.85<m(Theta*++)<2.00GeV/c^2 and 3.3x10^-7 for 2.00<m(Theta*++)<2.36GeV/c^2, at 90% confidence level. All results are preliminary.