A new dark sector antibaryon, denoted ψD, could be produced in decays of B mesons. This Letter presents a search for B+→ψD+p (and the charge conjugate) decays in e+e- annihilations at 10.58 GeV, using data collected in the BABAR experiment. Data corresponding to an integrated luminosity of 398 fb-1 are analyzed. No evidence for a signal is observed. Branching fraction upper limits in the range from 10-7-10-5 are obtained at 90% confidence level for masses of 1.0<4.3 GeV/c2. The result is also reinterpreted to provide the first limits on a supersymmetric model with R-parity violation and a light neutralino.
Search for Evidence of Baryogenesis and Dark Matter in B+→ψD+p Decays at BABAR
Gaz, A.;Margoni, M.;Simi, G.;Simonetto, F.;Stroili, R.;
2023
Abstract
A new dark sector antibaryon, denoted ψD, could be produced in decays of B mesons. This Letter presents a search for B+→ψD+p (and the charge conjugate) decays in e+e- annihilations at 10.58 GeV, using data collected in the BABAR experiment. Data corresponding to an integrated luminosity of 398 fb-1 are analyzed. No evidence for a signal is observed. Branching fraction upper limits in the range from 10-7-10-5 are obtained at 90% confidence level for masses of 1.0<4.3 GeV/c2. The result is also reinterpreted to provide the first limits on a supersymmetric model with R-parity violation and a light neutralino.
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