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 antibaryon (psi D) with branching fractions accessible at B factories. We present a search for B -> ?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 ? baryon in the remaining particles. No significant signal is observed, and bounds on the B -> ?psi D branching fraction are derived in the range 0.13-5.2 x 10-5 for 1.0 < m psi D < 4.2 GeV/c2. These results set strong constraints on the parameter space allowed by the theory.
Search for B mesogenesis at BaBar / J. . Lees, V.P.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 107:9(2023 May 03), pp. 092001.1-092001.5. [10.1103/physrevd.107.092001]
Search for B mesogenesis at BaBar
N. Neri;F. Palombo;F. Simonetto;
2023
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 antibaryon (psi D) with branching fractions accessible at B factories. We present a search for B -> ?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 ? baryon in the remaining particles. No significant signal is observed, and bounds on the B -> ?psi D branching fraction are derived in the range 0.13-5.2 x 10-5 for 1.0 < m psi D < 4.2 GeV/c2. These results set strong constraints on the parameter space allowed by the theory.| File | Dimensione | Formato | |
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