Strange-baryon spectroscopy through Bethe-Salpeter approach under harmonic confinement

Kulshreshtha, D. S. ; Mitra, A. N. ; Santhanam, I. (1982) Strange-baryon spectroscopy through Bethe-Salpeter approach under harmonic confinement Physical Review D - Particles, Fields, Gravitation and Cosmology, 26 (11). pp. 3131-3140. ISSN 1550-7998

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The unequal-quark-mass problem of excited Λ and ∑ states is treated through a multichannel generalization of a relativistic Bethe-Salpeter treatment of the simpler (equal-mass) problem of N and Δ as well as meson states recently found to give excellent fits to the corresponding spectra. The present fits to the Λ and ∑ masses are fully in tune with the quality of the NL and ΔL results, as evidenced by the highly consistent values of the appropriate universal function F(M) representing the central (mass)2 for each N supermultiplet, calculated with the same reduced spring constant and quark masses as employed earlier for NL, ΔL, and meson states. These F(M) values now include the one-gluon-exchange corrections which help in improving the F(M) regularities over the pure harmonic-oscillator prediction. The F(M) representation also brings out rather succinctly a modest symmetry-breaking trend (˜5-10%) at the collective supermultiplet level with little scatter among individual members.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:35087
Deposited On:09 Apr 2011 07:43
Last Modified:09 Apr 2011 07:43

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