Eur. Phys. J. A (2006) 28: 345-349
https://doi.org/10.1140/epja/i2006-10063-3

Hadron Physics

The 27-plet baryons with spin 3/2 under SU(3) symmetry

¹ Department of Physics, Peking University, 100871, Beijing, PRC
² CCAST (World Laboratory), P.O. Box 8730, 100080, Beijing, PRC

^* e-mail: mabq@phy.pku.edu.cn

Received: 4 April 2006
Accepted: 16 June 2006
Published online: 17 July 2006

Abstract

We investigate the spin-3/2 baryons in the 27-plet based on flavor SU(3) symmetry. For J ^p = 3/2⁺, we find all the candidates for non-exotic members. For J ^p = 3/2^-, we predict a new non-exotic member Λ(1780). Fitting the mass spectrum and calculating the widths of the members show an approximate symmetry of the 27-plet of SU(3). We find that the exotic members have relatively large widths and the Ξ(1950) has spin and parity J ^p = 3/2^-. The possibility of assigning the non-exotic candidates to an octet is also analyzed.