Eur. Phys. J. A (2008) 35: 325-328
https://doi.org/10.1140/epja/i2007-10561-8

Regular Article - Theoretical Physics

On the nature of the lowest 1/2^- baryon nonet and decuplet^⋆

¹ Institute of High Energy Physics, CAS, 100049, Beijing, China
² Theoretical Physics Center for Science Facilities, CAS, 100049, Beijing, China

^* e-mail: zoubs@ihep.ac.cn

Received: 18 December 2007
Accepted: 21 January 2008
Published online: 24 March 2008

Abstract

From our recent study of properties of the lowest spin-parity 1/2^- baryons, N ^*(1535) and Δ^*(1620) , new pictures for the internal structure of the lowest 1/2^- baryon nonet and decuplet are proposed. While the lowest 1/2^- baryon nonet may have large diquark-diquark-antiquark component, the lowest 1/2^- baryon decuplet is proposed to have large vector-meson-baryon components. Evidence for “missing" members of the new pictures is pointed out and suggestions are made for detecting these predicted states from forthcoming experiments.