Search for baryon and lepton number violation decay $D^{\pm }\to n(\bar{n})e^{\pm }$

Abstract

Using a data set of electron-positron collisions corresponding to an integrated luminosity of $2.93\mathrm{f}{\mathrm{b}}^{-1}$ taken with the BESIII detector at a center-of-mass energy of 3.773 GeV, a search for the baryon ($B$) and lepton ($L$) number violating decays $D^{\pm }\to n(\bar{n})e^{\pm }$ is performed. No signal is observed and the upper limits on the branching fractions at the $90\%$ confidence level are set to be $1.43\times 10^{-5}$ for the decays $D^{+(-)}\to \bar{n}(n)e^{+(-)}$ with $\Delta |B-L|=0$, and $2.91\times 10^{-5}$ for the decays $D^{+(-)}\to n(\bar{n})e^{+(-)}$ with $\Delta |B-L|=2$ , where $\Delta |B-L|$ denotes the change in the difference between baryon and lepton numbers.

References in corpus (13)

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• Development of a Data-Driven Method to Simulate the Detector Response of Anti-neutron at BESIII

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• Search for the baryon and lepton number violating decay $J/\psi \to p{e}^{-}$ + c.c