Phys. Rev. C 75, 055208 (2007) [5 pages]Search for Σ50,N50, and Θ++ pentaquark statesReceived 18 September 2006; published 25 May 2007 A high-resolution (σinstr.=1.5 MeV) search for narrow states (Γ<10 MeV) with masses of Mx≈1500–1850 MeV in ep→e′K+X,e′K-X, and e′π+X electroproduction at small angles and low Q2 was performed. These states would be candidate partner states of the reported Θ+(1540) pentaquark. No statistically significant signal was observed in any of the channels at 90% C.L. Upper limits on forward production were determined to be between 0.8% and 4.9% of the Λ(1520) production cross section, depending on the channel and the assumed mass and width of the state. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.75.055208
DOI:
10.1103/PhysRevC.75.055208
PACS:
12.39.Mk, 13.60.Rj, 14.20.Jn, 14.80.-j
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