Spectrum of heavy baryons in the quark model

T. Yoshida, E. Hiyama, A. Hosaka, M. Oka, K. Sadato

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

Single- and double-heavy baryons are studied in the constituent quark model. The model Hamiltonian is chosen as a standard one with two exceptions: (1) the color-Coulomb term depends on quark masses and (2) an antisymmetric LS (spin-orbit) force is introduced. Model parameters are fixed by the strange baryon spectra, Λ and Σ baryons. The masses of the observed charmed and bottomed baryons are, then, fairly well reproduced. Our focus is on the low-lying negative-parity states, in which the heavy baryons show specific excitation modes reflecting the mass differences of heavy and light quarks. By changing quark masses from the SU(3) limit to the strange quark mass, and, further, to the charm and bottom quark masses, we demonstrate that the spectra change from the SU(3) symmetry patterns to the heavy-quark-symmetry ones.

Original languageEnglish
Article number114029
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume92
Issue number11
DOIs
Publication statusPublished - Dec 28 2015

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quark models
baryons
quarks
symmetry
parity
orbits
color
excitation

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

Spectrum of heavy baryons in the quark model. / Yoshida, T.; Hiyama, E.; Hosaka, A.; Oka, M.; Sadato, K.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 92, No. 11, 114029, 28.12.2015.

Research output: Contribution to journalArticle

Yoshida, T. ; Hiyama, E. ; Hosaka, A. ; Oka, M. ; Sadato, K. / Spectrum of heavy baryons in the quark model. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2015 ; Vol. 92, No. 11.
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