The spectra of $bc\bar{b}\bar{c}$ tetraquark states from a diquark-antidiquark perspective
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866912725815263232 |
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| author | Wang, Zhen-Yang Qi, Jing-Juan Zhang, Zhen-Hua Guo, Xin-Heng |
| author_facet | Wang, Zhen-Yang Qi, Jing-Juan Zhang, Zhen-Hua Guo, Xin-Heng |
| contents | Within the diquark-antidiquark framework, this study investigates the masses of ground-state tetraquarks composed of heavy charm ($c$) and bottom ($b$) quarks and antiquarks, using the Bethe-Salpeter formalism. We establish the Bethe-Salpeter equations for the fully heavy $bc\bar{b}\bar{c}$ tetraquarks to the leading order in $1/m_Q$ expansion. These equations are subsequently solved numerically under the covariant instantaneous approximation with kernels containing scalar confinement and one-gluon exchange terms. Our results show that the spectra of all possible $S$-wave tetraquark states are above the corresponding two lowest meson decay thresholds via the quark rearrangement. This implies that the ground $bc\bar{b}\bar{c}$ tetraquark states should be broad. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_12366 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The spectra of $bc\bar{b}\bar{c}$ tetraquark states from a diquark-antidiquark perspective Wang, Zhen-Yang Qi, Jing-Juan Zhang, Zhen-Hua Guo, Xin-Heng High Energy Physics - Phenomenology Within the diquark-antidiquark framework, this study investigates the masses of ground-state tetraquarks composed of heavy charm ($c$) and bottom ($b$) quarks and antiquarks, using the Bethe-Salpeter formalism. We establish the Bethe-Salpeter equations for the fully heavy $bc\bar{b}\bar{c}$ tetraquarks to the leading order in $1/m_Q$ expansion. These equations are subsequently solved numerically under the covariant instantaneous approximation with kernels containing scalar confinement and one-gluon exchange terms. Our results show that the spectra of all possible $S$-wave tetraquark states are above the corresponding two lowest meson decay thresholds via the quark rearrangement. This implies that the ground $bc\bar{b}\bar{c}$ tetraquark states should be broad. |
| title | The spectra of $bc\bar{b}\bar{c}$ tetraquark states from a diquark-antidiquark perspective |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2508.12366 |