Mass and width of $T_{c\bar c}(4020)$ in the developed Bethe-Salpeter theory
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866911653460705280 |
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| author | Chen, Xiaozhao Lü, Xiaofu Guo, Xiurong Shi, Zonghua |
| author_facet | Chen, Xiaozhao Lü, Xiaofu Guo, Xiurong Shi, Zonghua |
| contents | In experiments exotic meson resonance $T_{c\bar c}(4020)$ lies above the $D^{*}\bar{D}^{*}$ threshold, and in principle one can not explain $T_{c\bar c}(4020)$ as a meson-meson bound state because meson-meson bound state must lie below the $D^{*}\bar{D}^{*}$ threshold. In this work, exotic resonance $T_{c\bar c}(4020)$ is considered as an unstable meson-meson molecular state $D^{*}\bar{D}^{*}$, and the developed Bethe-Salpeter theory for dealing with unstable state is applied to investigate resonance $T_{c\bar c}(4020)$. We calculate the mass and width of unstable meson-meson molecular state $D^{*}\bar{D}^{*}$ in the framework of relativistic quantum field theory and find that this unstable meson-meson molecular state lies above the $D^{*}\bar{D}^{*}$ threshold, which is consistent with experimental values of resonance $T_{c\bar c}(4020)$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_10315 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Mass and width of $T_{c\bar c}(4020)$ in the developed Bethe-Salpeter theory Chen, Xiaozhao Lü, Xiaofu Guo, Xiurong Shi, Zonghua High Energy Physics - Phenomenology In experiments exotic meson resonance $T_{c\bar c}(4020)$ lies above the $D^{*}\bar{D}^{*}$ threshold, and in principle one can not explain $T_{c\bar c}(4020)$ as a meson-meson bound state because meson-meson bound state must lie below the $D^{*}\bar{D}^{*}$ threshold. In this work, exotic resonance $T_{c\bar c}(4020)$ is considered as an unstable meson-meson molecular state $D^{*}\bar{D}^{*}$, and the developed Bethe-Salpeter theory for dealing with unstable state is applied to investigate resonance $T_{c\bar c}(4020)$. We calculate the mass and width of unstable meson-meson molecular state $D^{*}\bar{D}^{*}$ in the framework of relativistic quantum field theory and find that this unstable meson-meson molecular state lies above the $D^{*}\bar{D}^{*}$ threshold, which is consistent with experimental values of resonance $T_{c\bar c}(4020)$. |
| title | Mass and width of $T_{c\bar c}(4020)$ in the developed Bethe-Salpeter theory |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2503.10315 |