Search for Evidence of Baryogenesis and Dark Matter in $B^{+}\to {\psi }_{\text{D}}+\text{p}$ Decays at BABAR

Abstract

A new dark sector anti-baryon, denoted ${\psi }_{\text{D}}$, could be produced in decays of $B$ mesons. This letter presents a search for $B^{+}\to {\psi }_{\text{D}}+\text{p}$ (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 $<m_{{\psi }_{\text{D}}}<$ 4.3 GeV/c${}^2$. The result is also reinterpreted to provide the first limits on a supersymmetric model with R-parity violation and a light neutralino.

arXiv comment5 pages, 6 figures