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 → Λ ψD 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 → Λ ψD branching fraction are derived in the range 0.13–5.2 × 10^−5 for 1.0 < m_ψD < 4.2 GeV/c^2. These results set strong constraints on the parameter space allowed by the theory.
Search for B mesogenesis at BaBar
Pilloni, A.;
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 (ψD) with branching fractions accessible at B factories. We present a search for B → Λ ψD 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 → Λ ψD branching fraction are derived in the range 0.13–5.2 × 10^−5 for 1.0 < m_ψD < 4.2 GeV/c^2. These results set strong constraints on the parameter space allowed by the theory.Pubblicazioni consigliate
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