## Search for the radiative leptonic decay $D^{+}\to \gamma e^{+} {\nu}_{e}$

Using an electron-positron collision data sample of 2.93 fb$^{-1}$ collected at a center-of-mass energy of $\sqrt{s}=3.773$ GeV with the BESIII detector, we present the first search for the radiative leptonic decay $D^{+} \rightarrow \gamma e^{+}{\nu}_{e}$. The analysis is performed with a double tag method. We do not observe a significant $D^{+} \rightarrow \gamma e^{+}{\nu}_{e}$ signal, and obtain an upper limit on the branching fraction of $D^{+} \rightarrow \gamma e^{+}{\nu}_{e}$ decay with the energy of radiative photon larger than 10 MeV of $3.0\times10^{-5}$ at the 90% confidence level.

Publication Date:
Mar 01 2017
Date Submitted:
Jul 13 2018
ISSN:
2470-0029
Citation:
Physical Review D
D95
7
Note:
A freely accessible, full text version is available using the link(s) in External Resources.
External Resources: