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Using a $3.19~\mathrm{fb}^{-1}$ data sample collected at the$\sqrt{s}~=~4.178$ GeV with the BESIII detector, we search for the rare decay$D_{s}^{+} \rightarrow p \bar{p} e^{+} \nu_{e} $. No significant signal isobserved, and an upper limit of $\mathcal{B}(D_{s}^{+} \rightarrow p \bar{p}e^{+} \nu_{e}) < 2.0 \times 10^{-4}$ is set at the 90\% confidence level. Thismeasurement is useful input in understanding the baryonic transition of$D_{s}^{+}$ mesons.

Search for the decay $D_{s}^{+} \to p\bar{p}e^{+}\nu_{e}$