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Search for Strange-Pentaquark Production in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>e</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>e</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math>Annihilation at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>10.58</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>GeV</mml:mi></mml:math>
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 …