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
Batignani, G.;Bettarini, S.;Casarosa, G.;Forti, F.;Giorgi, M. A.;Paoloni, E.;Rizzo, G.;
2023-01-01
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
