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 qq̅ and per Υ(4S) decay. For qq̅ events the Θ(1540)+ [Ξ5(1860)--] limit is about 8 [4] times lower than the rates measured for ordinary baryons of similar mass.

Search for Strange-Pentaquark Production in e+e- Annihilation at √s=10.58  GeV

MARGONI, MARTINO;SIMONETTO, FRANCO;STROILI, ROBERTO;VOCI, CESARE;SIMI, GABRIELE;
2005

Abstract

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 qq̅ and per Υ(4S) decay. For qq̅ events the Θ(1540)+ [Ξ5(1860)--] limit is about 8 [4] times lower than the rates measured for ordinary baryons of similar mass.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/2435263
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