Abstract
The Λ baryon spectrum is studied within the SU(3) flavor symmetry in a constituent quark model. We found that it is rather difficult to accommodate some negative-parity Λ resonances as single q 2 s (q = u, d quarks) states in the conventional three-quark picture. The ground pentaquark mass spectrum is evaluated and a possible interpretation is proposed in the work: the observed Λ(1405)1/2−, Λ(1670)1/2− and Λ(1800)1/2− are three-state mixtures of two p-wave q 2 s states and one ground pentaquark state, so are the Λ(1520)3/2−, Λ(1690)3/2− and Λ(2050)3/2− resonances. Both Λ(1405)1/2− and Λ(1520)3/2− contain considerable pentaquark components.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Physics G: Nuclear and Particle Physics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
