Ground-state baryon masses in the perturbative chiral quark model
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Ground-state baryon masses in the perturbative chiral quark model
Apr 6, 2004 - arXiv:hep-ph/0404051v1 6 Apr 2004. Ground-state baryon masses in the perturbative chiral quark model. T. Inoue, V. E. Lyubovitskij, Th.
Ground-state baryon masses in the perturbative chiral quark model T. Inoue, V. E. Lyubovitskij, Th. Gutsche and Amand Faessler
arXiv:hep-ph/0404051v1 6 Apr 2004
Institut f¨ ur Theoretische Physik, Universit¨ at T¨ ubingen, Auf der Morgenstelle 14, D-72076 T¨ ubingen, Germany
Abstract Mass differences of the flavor octet and decuplet ground-state baryons are studied in the perturbative chiral quark model. We present a way to understand the nontrivial spin- and flavor dependent mass differences, where both pseudoscalar mesons and gluons play a significant role.
PACS: 12.39.Ki, 12.40.Yx, 14.20.Dh, 14.20.Gk Keywords: Chiral symmetry; Relativistic quark model; Effective Lagrangian; Baryon mass shifts. I. INTRODUCTION
In the na¨ıve non-interacting quark model the masses of ground-state baryons are solely classified by their strangeness. Therefore, in this limit the masses of nucleon and ∆, and also that of Λ and Σ, are degenerate. Traditionally, this degeneracy is removed by introducing a hyperfine(spin-spin) interaction [1,2] Hhyp =
