2006/09/30 by Y. Qiang, J. Annand, J. R. M. Annand +66
Physics and Astronomy · #Black Holes and Theoretical Physics #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #nucl-ex
paper · pdf · doi:10.1103/physrevc.75.055208
published as Phys.Rev.C75:055208,2007 · 5 pages, 5 figures, to appear in Phys. Rev. C, update with responses to referee suggestions
arxiv created 2007/05/02 · openalex publication_date 2007/05/25 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
A high-resolution (\ensuremathσinstr.=1.5 MeV) search for narrow states (\ensuremathΓ<10 MeV) with masses of Mx\ensuremath≈1500--1850 MeV in ep\ensuremath→e^\ensuremath'K+X,e^\ensuremath'K^\ensuremath-X, and e^\ensuremath'\ensuremathπ+X electroproduction at small angles and low Q2 was performed. These states would be candidate partner states of the reported \ensuremathΘ+(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 \ensuremathΛ(1520) production cross section, depending on the channel and the assumed mass and width of the state.