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 -meson decays into a baryon and a dark-sector antibaryon () with branching fractions accessible at factories. We present a search for decays using data collected by the BABAR experiment at SLAC. This reaction is identified by fully reconstructing the accompanying meson and requiring the presence of a single baryon in the remaining particles. No significant signal is observed, and bounds on the branching fraction are derived in the range for . These results set strong constraints on the parameter space allowed by the theory.
- Received 1 February 2023
- Accepted 23 March 2023
DOI:https://doi.org/10.1103/PhysRevD.107.092001
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society