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arXiv · 2606.07776

B Meson Semi-Invisible Decays via Perturbative QCD

Han-Bing Liu·Ye Xing·Bin Luo
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Abstract

This paper focuses on the dark sector decay processes of $B$ mesons ($B\to \mathcal{B}_8\ +$ invisible). Using the perturbative QCD (pQCD) approach combined with flavor symmetry analysis, we calculate the branching ratios for decays from $B$ mesons into light baryons and dark baryons within two distinct $B$-Mesogenesis scenarios. A detailed discussions of the form factor $B\to \mathcal{B}_8$ are presented. Based on the derived form factors and effective couplings, we then reach the final numerical analysis. The results show that the branching ratios are sizable, especially for $B^0\to \Lambda\psi$ and $B_s^0\to\Xi^0\psi$ in Type-I model, with values on the order of $\mathcal{O}(10^{-5})$ . Such processes are expected to facilitate the search for dark matter at hadron colliders and B factories.

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Han-Bing Liu, Ye Xing, Bin Luo. 2026-06-05. B Meson Semi-Invisible Decays via Perturbative QCD. https://arxiv.org/abs/2606.07776

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