Spectra of charmed and bottom baryons with hyperfine interaction

  • Up to now, the excited charmed and bottom baryon states have still not been well studied experimentally or theoretically. In this paper, we predict the mass of Ωb*, the only L=0 baryon state which has not been observed, to be 6069.2 MeV. The spectra of charmed and bottom baryons with the orbital angular momentum L=1 are studied in two popular constituent quark models, the Goldstone boson exchange (GBE) model and the one gluon exchange (OGE) hyperfine interaction model. Inserting the latest experimental data from the "Review of Particle Physics", we find that in the GBE model, there exist some multiplets (∑c(b), Ξ'c(b) and Ωc(b)) in which the total spin of the three quarks in their lowest energy states is 3/2, but in the OGE model there is no such phenomenon. This is the most important difference between the GBE and OGE models. These results can be tested in the near future. We suggest more efforts to study the excited charmed and bottom baryons both theoretically and experimentally, not only for the abundance of baryon spectra, but also for determining which hyperfine interaction model best describes nature.
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Zhen-Yang Wang, Jing-Juan Qi, Xin-Heng Guo and Ke-Wei Wei. Spectra of charmed and bottom baryons with hyperfine interaction[J]. Chinese Physics C, 2017, 41(9): 093103. doi: 10.1088/1674-1137/41/9/093103
Zhen-Yang Wang, Jing-Juan Qi, Xin-Heng Guo and Ke-Wei Wei. Spectra of charmed and bottom baryons with hyperfine interaction[J]. Chinese Physics C, 2017, 41(9): 093103.  doi: 10.1088/1674-1137/41/9/093103 shu
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Received: 2017-02-10
Revised: 2017-05-12
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    Supported by National Natural Science Foundation of China (11175020, 11575023, U1204115)

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Spectra of charmed and bottom baryons with hyperfine interaction

    Corresponding author: Zhen-Yang Wang,
    Corresponding author: Jing-Juan Qi,
    Corresponding author: Xin-Heng Guo,
    Corresponding author: Ke-Wei Wei,
  • 1.  College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China
  • 2.  College of Physics and Electrical Engineering, Anyang Normal University, Anyang 455000, China
Fund Project:  Supported by National Natural Science Foundation of China (11175020, 11575023, U1204115)

Abstract: Up to now, the excited charmed and bottom baryon states have still not been well studied experimentally or theoretically. In this paper, we predict the mass of Ωb*, the only L=0 baryon state which has not been observed, to be 6069.2 MeV. The spectra of charmed and bottom baryons with the orbital angular momentum L=1 are studied in two popular constituent quark models, the Goldstone boson exchange (GBE) model and the one gluon exchange (OGE) hyperfine interaction model. Inserting the latest experimental data from the "Review of Particle Physics", we find that in the GBE model, there exist some multiplets (∑c(b), Ξ'c(b) and Ωc(b)) in which the total spin of the three quarks in their lowest energy states is 3/2, but in the OGE model there is no such phenomenon. This is the most important difference between the GBE and OGE models. These results can be tested in the near future. We suggest more efforts to study the excited charmed and bottom baryons both theoretically and experimentally, not only for the abundance of baryon spectra, but also for determining which hyperfine interaction model best describes nature.

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