We report on recent searches for low-mass New Physics states with the BaBar experiment, both in B-mesons decays and directly in $e^+ e^-$ interactions.
The full dataset of 531 fb$^{−1}$ is used, including 432 fb$^{−1}$ at the $\Upsilon (4s)$ resonance.
New results are presented on the search for B mesogenesis in B decays to a standard model baryon $\Lambda$ or proton and a dark antibaryon.
Recently published results on searches for Axion Like Particles and Darkonium lead to significant improvements in constraining the dark sector.