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 language | English |
|---|---|
| Article number | 114029 |
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 92 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Dec 28 2015 |
Fingerprint
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 journal › Article
}
TY - JOUR
T1 - Spectrum of heavy baryons in the quark model
AU - Yoshida, T.
AU - Hiyama, E.
AU - Hosaka, A.
AU - Oka, M.
AU - Sadato, K.
PY - 2015/12/28
Y1 - 2015/12/28
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84953245287&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84953245287&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.92.114029
DO - 10.1103/PhysRevD.92.114029
M3 - Article
AN - SCOPUS:84953245287
VL - 92
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
SN - 1550-7998
IS - 11
M1 - 114029
ER -