Search for the rare decay $D^{+}\to D^0{e}^{+}\hat{I}{½}_e$

Abstract

We search for the rare decay $D^{+}\to D^0{e}^{+}\hat{I}{½}_e$, using a data set with an integrated luminosity of 2.93 $\mathrm{f}{\mathrm{b}}^{-1}$ collected at $\sqrt{s}=3.773$ GeV with the BESIII detector operating at the BEPCII storage rings. No signals are observed. We set the upper limit on the branching fraction for $D^{+}\to D^0{e}^{+}\hat{I}{½}_e$ to be $1.0\times 10^{-4}$ at the 90\% confidence level.

8 pages, 2 figures