Bottom baryon decays into light meson and dark baryon within perturbative QCD approach

TL;DR

This paper calculates the decay rates of bottom baryons into light mesons and dark baryons using perturbative QCD, predicting measurable branching ratios that can be tested at collider experiments.

Contribution

It provides the first detailed perturbative QCD calculations of bottom baryon decays into dark baryons within B-Mesogenesis models, including form factors and branching ratios.

Findings

Branching ratios reach approximately 10^{-5} in both models.

The decay $ ext{Lambda}_b o K ext{psi}$ can reach about 10^{-4}.

Predictions are testable at LHCb and B-factories.

Abstract

In the work, we study the production of dark baryon $\psi$ with the bottom-baryon decays $\Lambda_b\to M \psi$ under the perturbative QCD approach. For the Type-I/II models in B-Mesogenesis scenarios, we calculate the form factors for bottom-baryon decays into meson. Using these results, we obtain branching ratios for $\Lambda_b\to M \psi$ decays. The PQCD approach calculations show these branching ratios reach $\mathcal{O}(10^{-5})$ in both models, with $\mathcal{B}(\Lambda_b\to K\psi)$ specifically reaching $\mathcal{O}(10^{-4})$ in Type-II. These accessible magnitudes make the predictions testable at the LHCb and B-factories with improved precision.