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 (ψD) with branching fractions accessible at B factories. We present a search for B→ΛψD 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 Λ baryon in the remaining particles. No significant signal is observed, and bounds on the B→ΛψD branching fraction are derived in the range 0.13-5.2×10-5 for 1.0<4.2 GeV/c2. These results set strong constraints on the parameter space allowed by the theory.

Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2023). Search for B mesogenesis at B a B ar. PHYSICAL REVIEW D, 107(9) [10.1103/PhysRevD.107.092001].

Search for B mesogenesis at B a B ar

Carpinelli M.;
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 (ψD) with branching fractions accessible at B factories. We present a search for B→ΛψD 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 Λ baryon in the remaining particles. No significant signal is observed, and bounds on the B→ΛψD branching fraction are derived in the range 0.13-5.2×10-5 for 1.0<4.2 GeV/c2. These results set strong constraints on the parameter space allowed by the theory.
Articolo in rivista - Articolo scientifico
BaBar
English
2023
107
9
092001
none
Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2023). Search for B mesogenesis at B a B ar. PHYSICAL REVIEW D, 107(9) [10.1103/PhysRevD.107.092001].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/471538
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