Journal
PHYSICAL REVIEW D
Volume 92, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.92.114029
Keywords
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Funding
- JSPS KAKENHI [25247036, 24250294, 26400273]
- Junior Research Associate scholarship
- Grants-in-Aid for Scientific Research [25247036, 26400273] Funding Source: KAKEN
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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,. and Sigma 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.
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