Abstract
Using a data sample with an integrated luminosity of taken at the center-of-mass energy of 3.773 GeV, we search for the Majorana neutrino () in the lepton number violating decays . No significant signal is observed, and the upper limits on the branching fraction at the 90% confidence level are set to be , and . The Majorana neutrino is searched for with different mass assumptions ranging from 0.25 to in the decays and , and the upper limits on the branching fraction at the 90% confidence level are at the level of , depending on the mass of the Majorana neutrino. The constraints on the mixing matrix element are also evaluated.
- Received 7 February 2019
DOI:https://doi.org/10.1103/PhysRevD.99.112002
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