Physical Review D | 2019
Search for baryon and lepton number violating decays $D^+\\to\\bar\\Lambda(\\bar\\Sigma^0)e^+$ and $D^+\\to\\Lambda(\\Sigma^0)e^+$
Abstract
Using a 2.93\u2009\u2009fb-1 data sample of electron-positron collisions taken with the BESIII detector at a center-of-mass energy of 3.773\xa0GeV, which corresponds to (8296±31±64)×103D+D- pairs, we search for the baryon and lepton number violating decays D+→Λ¯(Σ¯0)e+ and D+→Λ(Σ0)e+. No obvious signals are found with the current statistics and upper limits on the branching fractions of these four decays are set at the level of 10-6 at 90% confidence level.