Search for $B$ Mesogenesis at BABAR

Abstract

A new mechanism has been proposed to simultaneously explain the presence of dark matter and the matter-antimatter asymmetry in the universe. This scenario predicts exotic $B$ meson decays into a baryon and a dark sector anti-baryon (${\psi }_D$) with branching fractions accessible at $B$ factories. We present a search for $B\to \Lambda {\psi }_D$ decays using data collected by the $BABAR$ experiment at SLAC. This reaction is identified by fully reconstructing the accompanying $B$ meson and requiring the presence of a single $\Lambda$ baryon in the remaining particles. No significant signal is observed, and bounds on the $B\to \Lambda {\psi }_D$ branching fraction are derived in the range $0.13-5.2\times 10^{-5}$ for $1.0<m_{{\psi }_D}<4.2$ GeV/$c^2$. These results set strong constraints on the parameter space allowed by the theory.

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• Probing Dark Sectors with Neutron Stars
• How Macroscopic Limits on Neutron Star Baryon Loss Yield Microscopic Limits on Non-Standard-Model Baryon Decay
• Invisible and Semi-invisible Decays of Bottom Baryons
• Light-cone sum rules with $B$-meson distribution amplitudes for the $B\to p$ form factors in $B$-mesogenesis models