Production of pentaquarks with hidden charm and double strangeness in $Ξ_b$ and $Ω_b$ decays
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arXiv
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2024
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| _version_ | 1866913977408159744 |
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| author | Oset, E. Roca, L. Whitehead, M. |
| author_facet | Oset, E. Roca, L. Whitehead, M. |
| contents | Recently, several pentaquark states $P_{css}$, with global flavor $\bar c c s s n$, have been predicted within a theoretical framework based on unitary coupled channels. We study theoretically the feasibility to observe the $P_{css}$ with $I(J^P)=\frac{1}{2}(\frac{1}{2}^-)$ in the decays $Ξ_b^0\to ηη_c Ξ^0$ and $Ω_b^-\to K^- η_c Ξ^0$. Indeed, within the model, the $η_c Ξ^0$ channel is the lowest mass pseudoscalar-baryon channel to which this pentaquark state couples, thus we can expect to observe its signal in the $η_c Ξ^0$ invariant mass distribution of the mentioned decays. We identify the dominant weak decay processes and then implement the hadronization into the different meson-baryon channels in the final state, linked by flavor symmetry. The dominant meson-baryon final state interaction is then implemented to generate the full amplitude, implicitly accounting for the dynamical emergence of the pentaquark states. We obtain a clear Breit-Wigner-like resonant signal in the spectrum of the $Ω_b^-$ decay, exceeding that in the $Ξ_b^0$ decay by two to three orders of magnitude. In the case of the latter decay, the resonant state would manifest as a significant dip in the spectrum. We study the feasibility of searching for these $b$-hadron decay modes and analysing their resonant components using the current and future data samples from the LHCb experiment. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2406_16504 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Production of pentaquarks with hidden charm and double strangeness in $Ξ_b$ and $Ω_b$ decays Oset, E. Roca, L. Whitehead, M. High Energy Physics - Phenomenology Recently, several pentaquark states $P_{css}$, with global flavor $\bar c c s s n$, have been predicted within a theoretical framework based on unitary coupled channels. We study theoretically the feasibility to observe the $P_{css}$ with $I(J^P)=\frac{1}{2}(\frac{1}{2}^-)$ in the decays $Ξ_b^0\to ηη_c Ξ^0$ and $Ω_b^-\to K^- η_c Ξ^0$. Indeed, within the model, the $η_c Ξ^0$ channel is the lowest mass pseudoscalar-baryon channel to which this pentaquark state couples, thus we can expect to observe its signal in the $η_c Ξ^0$ invariant mass distribution of the mentioned decays. We identify the dominant weak decay processes and then implement the hadronization into the different meson-baryon channels in the final state, linked by flavor symmetry. The dominant meson-baryon final state interaction is then implemented to generate the full amplitude, implicitly accounting for the dynamical emergence of the pentaquark states. We obtain a clear Breit-Wigner-like resonant signal in the spectrum of the $Ω_b^-$ decay, exceeding that in the $Ξ_b^0$ decay by two to three orders of magnitude. In the case of the latter decay, the resonant state would manifest as a significant dip in the spectrum. We study the feasibility of searching for these $b$-hadron decay modes and analysing their resonant components using the current and future data samples from the LHCb experiment. |
| title | Production of pentaquarks with hidden charm and double strangeness in $Ξ_b$ and $Ω_b$ decays |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2406.16504 |