||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 event that are about eight and four times lower than the rates measured for ordinary baryons of similar mass.
||Tots els drets reservats.
||article ; publishedVersion
Upsilon meson resonances ;
Electron-positron inclusive interactions ;
Hyperon resonances ;
||Physical review letters, Vol. 95, Issue 4 (July 2005) , p. 042002-1-042002-7, ISSN 0031-9007