We search for the leptonic decay using an collision data sample with an integrated luminosity of 20.3 fb collected with the BESIII detector at a center-of-mass energy of 3.773 GeV. Significant signal is not observed, and an upper limit on the branching fraction of is set as , at a confidence level of 90%. Our upper limit is an order of magnitude smaller than the previous limit for this decay mode.
Search for the leptonic decay D+ →e+ νe
A. Amoroso;F. Bianchi;A. Bortone;M. Destefanis;F. De Mori;M. Greco;L. Lavezzi;M. Maggiora;S. Marcello;S. Sosio;S. Spataro;
2025-01-01
Abstract
We search for the leptonic decay using an collision data sample with an integrated luminosity of 20.3 fb collected with the BESIII detector at a center-of-mass energy of 3.773 GeV. Significant signal is not observed, and an upper limit on the branching fraction of is set as , at a confidence level of 90%. Our upper limit is an order of magnitude smaller than the previous limit for this decay mode.
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