Searches for Pentaquark Baryons at BaBar

Abstract

This paper presents the results of inclusive searches for the strange pentaquark states ${\Theta }^{+}(1540)$, ${\Xi }_5^{--}(1860)$ and ${\Xi }_5(1860{)}^0$ as well as the anti-charm pentaquark state ${\Theta }_c(3099{)}^0$ in a dataset of 123.4 fb${}^{-1}$ collected on and 40MeV below the ${\rm Y}(4S)$ resonance by the BABAR detector at the $e^{+}{e}^{-}$ PEPII storage rings. No evidence for the pentaquark states is found and upper limits on the rate of ${\Theta }^{+}(1540)$ and ${\Xi }_5^{--}(1860)$ production in $e^{+}{e}^{-}$ annihilation are obtained.

4 pages, 2 postscript figues, contributed to the Proceedings of HADRON05