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paper

Does the Sigma(1580)3/2- resonance exist?

arXiv:nucl-ex/0308005 · doi:10.1016/j.physletb.2004.02.070

Abstract

Precise new data for the reaction $K^- p \to π^0 Λ$ are presented in the c.m. energy range 1565 to 1600 MeV. Our analysis of these data sheds new light on claims for the $Σ(1580){3/2}^-$ resonance, which (if it exists with the specified quantum numbers) must be an exotic baryon because of its very low mass. Our results show no evidence for this state.

4 pages, 4 figures