Search for the decay Ds+ ?p p e+?e SEARCH for the DECAY Ds+ ?p p e+?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+?ppe+?e. No significant signal is observed, and an upper limit of B(Ds+?ppe+?e)<2.0×10-4 is set at the 90% confidence level. This measurement is useful input in understanding the baryonic transition of Ds+ mesons.