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

Abstract

Using a 3.19 fb−1 data sample collected at the s = 4.178 GeV with the BESIII detector, we search for the rare decay Ds+→pp¯e+νe. No significant signal is observed, and an upper limit of B(Ds+→pp¯e+νe)<2.0×10−4 is set at the 90% confidence level. This measurement is useful input in understanding the baryonic transition of Ds+ mesons.