Searches for Dark Matter and Baryogenesis at BABAR*

We present recent searches for reactions that could simultaneously explain the presence of dark matter and the matter-antimatter asymmetry in the Universe. This scenario predicts $B$-meson decays into an ordinary-matter baryon and a dark-sector anti-baryon with branching fractions accessible at the factories.

The results are based on a dataset of 430 $fb^{-1}$ $e^{+}e^{-} \rightarrow B \bar{B}$ decays collected at the BABAR detector at the PEP-II collider.

We search for decays where the outgoing visible particle is a Standard Model baryon (proton or lambda) and is accompanied by missing mass. The missing mass of signal meson is considered as the mass of the dark particle. Stringent upper limits on the decay branching fractions are derived for masses between 1.0 and 4.3 GeV/c.