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Search for Strange-Pentaquark Production in e+e- Annihilation at sqrt(s)=10.58 GeV

The BABAR Collaboration·B. Aubert
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Abstract

We search for strange pentaquark states that have been previously reported by other experiments -- the $Θ(1540)^+$, $Ξ_5(1860)^{--}$, and $Ξ_5(1860)^0$ -- 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 $Ξ_5(1860)^{--}$ 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.

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The BABAR Collaboration, B. Aubert. 2005-02-01. Search for Strange-Pentaquark Production in e+e- Annihilation at sqrt(s)=10.58 GeV. https://doi.org/10.1103/physrevlett.95.042002

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