Abstract
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
q
3
s
q
¯
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
q
3
s
q
¯
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
q
3
s
q
¯
pentaquark components.
Funder
Suranaree University of Technology
Thailand Science Research and Innovation
NSRF via the Program Management Unit for Human Resources and Institutional Development, Research and Innovation
Subject
Nuclear and High Energy Physics
Cited by
2 articles.
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