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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2402.16051 |
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| _version_ | 1866911783921385472 |
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| author | Zhang, Ying He, Guangzhao Ye, Quanxing Yan, Da-Cheng Hua, Jun Wang, Qian |
| author_facet | Zhang, Ying He, Guangzhao Ye, Quanxing Yan, Da-Cheng Hua, Jun Wang, Qian |
| contents | The structure of light diquarks plays a crucial role in the formation of exotic hadrons beyond the conventional quark model, especially in their line shapes of bottomed hadron decays. We study the two-body hadronic weak decays of bottomed baryons and bottomed mesons to probe the light diquark structure and pin down the quark-quark correlations in the diquark picture. We find that the light diquark does not favor a compact structure. For instance, the isoscalar diquark $[ud]$ in $Λ_{b}^{0}$ can be easily split and rearranged to form $Σ_{c}^{(*)}\bar{D}^{(*)}$ via the color-suppressed transition. This provides a hint that the hidden charm pentaquark states produced in $Λ^0_b$ decays could be the $Σ_{c}^{(*)}\bar{D}^{(*)}$ hadronic molecular candidates. This quantitative study resolves the apparent conflicts between the production mechanism and molecular nature of these $P_c$ states observed in experiment. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_16051 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Two-body hadronic weak decays of bottomed hadrons Zhang, Ying He, Guangzhao Ye, Quanxing Yan, Da-Cheng Hua, Jun Wang, Qian High Energy Physics - Phenomenology The structure of light diquarks plays a crucial role in the formation of exotic hadrons beyond the conventional quark model, especially in their line shapes of bottomed hadron decays. We study the two-body hadronic weak decays of bottomed baryons and bottomed mesons to probe the light diquark structure and pin down the quark-quark correlations in the diquark picture. We find that the light diquark does not favor a compact structure. For instance, the isoscalar diquark $[ud]$ in $Λ_{b}^{0}$ can be easily split and rearranged to form $Σ_{c}^{(*)}\bar{D}^{(*)}$ via the color-suppressed transition. This provides a hint that the hidden charm pentaquark states produced in $Λ^0_b$ decays could be the $Σ_{c}^{(*)}\bar{D}^{(*)}$ hadronic molecular candidates. This quantitative study resolves the apparent conflicts between the production mechanism and molecular nature of these $P_c$ states observed in experiment. |
| title | Two-body hadronic weak decays of bottomed hadrons |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2402.16051 |