Type: Article
Publication Date: 2005-07-21
Citations: 28
DOI: https://doi.org/10.1103/physrevlett.95.042002
We search for strange-pentaquark states that have been previously reported by other experiments—the Θ(1540)+, Ξ5(1860)−−, and Ξ5(1860)0—in 123 fb−1 of data recorded with the BABAR detector at the PEP-II e+e− storage ring. We find no evidence for these states and set 95% confidence level upper limits on the number of Θ(1540)+ and Ξ5(1860)−− pentaquarks produced per e+e− annihilation into q¯q and per Υ(4S) decay. For q¯q events the Θ(1540)+ [Ξ5(1860)−−] limit is about 8 [4] times lower than the rates measured for ordinary baryons of similar mass.Received 1 February 2005DOI:https://doi.org/10.1103/PhysRevLett.95.042002©2005 American Physical Society