Hidden charm ${\cal P}_{cs}(4338)^0$ production in baryonic $B^-\to J/ψΛ\bar p$ decay
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| Format: | Preprint |
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2024
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| _version_ | 1866908332671893504 |
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| author | Hsiao, Yu-Kuo Cai, Shu-Ting Wang, Yan-Li |
| author_facet | Hsiao, Yu-Kuo Cai, Shu-Ting Wang, Yan-Li |
| contents | We investigate the resonant baryonic $B$ decay $B^-\to {\cal P}_{cs}^0\bar p,{\cal P}_{cs}^0\to J/ψΛ$, where ${\cal P}_{cs}^0\equiv {\cal P}_{cs}(4338)^0$ is identified as a hidden charm pentaquark candidate with strangeness. By interpreting ${\cal P}_{cs}^0$ as the $Ξ_c\bar D$ molecule that strongly decays into $J/ψΛ$ and $η_cΛ$, we discover a dominant triangle rescattering effect for $B^-\to {\cal P}_{cs}^0\bar p$, initiated by $B^-\to J/ψK^-$. Through the exchange of a $\bar Λ$ anti-baryon, $J/ψ$ and $K^-$ undergo rescattering, transforming into ${\cal P}_{cs}^0$ and $\bar p$, respectively. Based on this rescattering mechanism, we calculate ${\cal B}(B^-\to {\cal P}_{cs}^0\bar p,{\cal P}_{cs}^0\to J/ψΛ) =(1.4^{+2.1}_{-1.1})\times10^{-6}$, which is consistent with the measured data. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2409_04951 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Hidden charm ${\cal P}_{cs}(4338)^0$ production in baryonic $B^-\to J/ψΛ\bar p$ decay Hsiao, Yu-Kuo Cai, Shu-Ting Wang, Yan-Li High Energy Physics - Phenomenology High Energy Physics - Experiment We investigate the resonant baryonic $B$ decay $B^-\to {\cal P}_{cs}^0\bar p,{\cal P}_{cs}^0\to J/ψΛ$, where ${\cal P}_{cs}^0\equiv {\cal P}_{cs}(4338)^0$ is identified as a hidden charm pentaquark candidate with strangeness. By interpreting ${\cal P}_{cs}^0$ as the $Ξ_c\bar D$ molecule that strongly decays into $J/ψΛ$ and $η_cΛ$, we discover a dominant triangle rescattering effect for $B^-\to {\cal P}_{cs}^0\bar p$, initiated by $B^-\to J/ψK^-$. Through the exchange of a $\bar Λ$ anti-baryon, $J/ψ$ and $K^-$ undergo rescattering, transforming into ${\cal P}_{cs}^0$ and $\bar p$, respectively. Based on this rescattering mechanism, we calculate ${\cal B}(B^-\to {\cal P}_{cs}^0\bar p,{\cal P}_{cs}^0\to J/ψΛ) =(1.4^{+2.1}_{-1.1})\times10^{-6}$, which is consistent with the measured data. |
| title | Hidden charm ${\cal P}_{cs}(4338)^0$ production in baryonic $B^-\to J/ψΛ\bar p$ decay |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2409.04951 |