Abstract
In an exclusive measurement of the reaction , a narrow peak that can be attributed to an exotic baryon with strangeness is seen in the invariant mass spectrum. The peak is at with a measured width of FWHM, which is largely determined by experimental mass resolution. The statistical significance of the peak is . The mass and width of the observed peak are consistent with recent reports of a narrow baryon by other experimental groups.
- Received 16 July 2003
DOI:https://doi.org/10.1103/PhysRevLett.91.252001
©2003 American Physical Society