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arXiv · 2402.16051

Two-body hadronic weak decays of bottomed hadrons

Ying Zhang·Guangzhao He·Quanxing Ye·Da-Cheng Yan·Jun Hua·Qian Wang
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Abstract

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 $\Lambda_{b}^{0}$ can be easily split and rearranged to form $\Sigma_{c}^{(*)}\bar{D}^{(*)}$ via the color-suppressed transition. This provides a hint that the hidden charm pentaquark states produced in $\Lambda^0_b$ decays could be the $\Sigma_{c}^{(*)}\bar{D}^{(*)}$ 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.

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Ying Zhang, Guangzhao He, Quanxing Ye, Da-Cheng Yan, Jun Hua, Qian Wang. 2024-02-25. Two-body hadronic weak decays of bottomed hadrons. https://arxiv.org/abs/2402.16051

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