Spectra of charmed and bottom baryons with hyperfine interaction

Zhen-Yang Wang; Jing-Juan Qi; Xin-Heng Guo; Ke-Wei Wei

doi:10.1088/1674-1137/41/9/093103

Chinese Physics C> 2017, Vol. 41> Issue(9) : 093103 DOI: 10.1088/1674-1137/41/9/093103

Spectra of charmed and bottom baryons with hyperfine interaction

Zhen-Yang Wang ^1,, ,
Jing-Juan Qi ^1,, ,
Xin-Heng Guo ^1,, ,
Ke-Wei Wei ^2,,

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

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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 Ω_b^*, 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 Ω_c(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.
- charmed baryons ,
- bottom baryons ,
- mass spectra ,
- fine and hyperfine structure

References

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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

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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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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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

Received Date: 2017-02-10

Accepted Date: 2017-05-12

Available Online: 2017-09-05

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 Ω_b^*, 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 Ω_c(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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Spectra of charmed and bottom baryons with hyperfine interaction

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