Heavy quark dominance in orbital excitation of singly and doubly heavy baryons
Abstract A mechanism of the heavy quark dominance in the orbital excitation is proposed in this paper which is testified to be reasonable for singly and doubly heavy baryons. In the relativistic quark model, an analysis of the Hamiltonian figures out the mechanism that the excitation mode with lower...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-02-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-024-12457-7 |
| _version_ | 1797209142632382464 |
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| author | Zhen-Yu Li Guo-Liang Yu Zhi-Gang Wang Jian-Zhong Gu |
| author_facet | Zhen-Yu Li Guo-Liang Yu Zhi-Gang Wang Jian-Zhong Gu |
| author_sort | Zhen-Yu Li |
| collection | DOAJ |
| description | Abstract A mechanism of the heavy quark dominance in the orbital excitation is proposed in this paper which is testified to be reasonable for singly and doubly heavy baryons. In the relativistic quark model, an analysis of the Hamiltonian figures out the mechanism that the excitation mode with lower energy levels is always associated with the heavy quark(s), and the splitting of the energy levels is suppressed by the heavy quark(s). So, the heavy quarks dominate the orbital excitation of singly and doubly heavy baryons. Furthermore, a physical understanding of this mechanism is given in a semi-classical way. Accordingly, the predicted mass spectra of singly and doubly heavy baryons confirm the rationality of this mechanism. In addition, an interesting consequence of this mechanism is that a heavy-light meson is more likely to be produced in the strong decay of the high-orbital excited states, which is supported by experiments. This mechanism is rooted in the breakdown of the mass symmetry. Therefore, it may be also valid for other multi-quark systems, such as the tetraquarks Qqqq and QQqq, or the pentaquarks Qqqqq and QQqqq. |
| first_indexed | 2024-03-07T14:44:48Z |
| format | Article |
| id | doaj.art-80eb9cca3d0e4eb1a9bc30e3e8c044cd |
| institution | Directory Open Access Journal |
| issn | 1434-6052 |
| language | English |
| last_indexed | 2024-04-24T09:50:00Z |
| publishDate | 2024-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-80eb9cca3d0e4eb1a9bc30e3e8c044cd2024-04-14T11:26:37ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522024-02-0184211410.1140/epjc/s10052-024-12457-7Heavy quark dominance in orbital excitation of singly and doubly heavy baryonsZhen-Yu Li0Guo-Liang Yu1Zhi-Gang Wang2Jian-Zhong Gu3School of Physics and Electronic Science, Guizhou Education UniversityDepartment of Mathematics and Physics, North China Electric Power UniversityDepartment of Mathematics and Physics, North China Electric Power UniversityChina Institute of Atomic EnergyAbstract A mechanism of the heavy quark dominance in the orbital excitation is proposed in this paper which is testified to be reasonable for singly and doubly heavy baryons. In the relativistic quark model, an analysis of the Hamiltonian figures out the mechanism that the excitation mode with lower energy levels is always associated with the heavy quark(s), and the splitting of the energy levels is suppressed by the heavy quark(s). So, the heavy quarks dominate the orbital excitation of singly and doubly heavy baryons. Furthermore, a physical understanding of this mechanism is given in a semi-classical way. Accordingly, the predicted mass spectra of singly and doubly heavy baryons confirm the rationality of this mechanism. In addition, an interesting consequence of this mechanism is that a heavy-light meson is more likely to be produced in the strong decay of the high-orbital excited states, which is supported by experiments. This mechanism is rooted in the breakdown of the mass symmetry. Therefore, it may be also valid for other multi-quark systems, such as the tetraquarks Qqqq and QQqq, or the pentaquarks Qqqqq and QQqqq.https://doi.org/10.1140/epjc/s10052-024-12457-7 |
| spellingShingle | Zhen-Yu Li Guo-Liang Yu Zhi-Gang Wang Jian-Zhong Gu Heavy quark dominance in orbital excitation of singly and doubly heavy baryons European Physical Journal C: Particles and Fields |
| title | Heavy quark dominance in orbital excitation of singly and doubly heavy baryons |
| title_full | Heavy quark dominance in orbital excitation of singly and doubly heavy baryons |
| title_fullStr | Heavy quark dominance in orbital excitation of singly and doubly heavy baryons |
| title_full_unstemmed | Heavy quark dominance in orbital excitation of singly and doubly heavy baryons |
| title_short | Heavy quark dominance in orbital excitation of singly and doubly heavy baryons |
| title_sort | heavy quark dominance in orbital excitation of singly and doubly heavy baryons |
| url | https://doi.org/10.1140/epjc/s10052-024-12457-7 |
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