Search for baryon and lepton number violating decay ${D}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}n(\overline{n}){e}^{\ifmmode\pm\else\textpm\fi{}}$

Open Access

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

M. Ablikim et al. (BESIII Collaboration)

Phys. Rev. D 106, 112009 – Published 26 December 2022

Abstract

Using a data set of electron-positron collisions corresponding to an integrated luminosity of $293 {fb}^{- 1}$ 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 $Δ | B - L | = 0$ , and $2.91 \times 10^{- 5}$ for the decays $D^{+ (-)} \to n (\bar{n}) e^{+ (-)}$ with $Δ | B - L | = 2$ , where $Δ | B - L |$ denotes the change in the difference between baryon and lepton numbers.

Received 14 September 2022
Accepted 29 November 2022

DOI:https://doi.org/10.1103/PhysRevD.106.112009

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

Published by the American Physical Society