Abstract
A search is performed for the lepton number violating decay , where represents a or a , using an integrated luminosity of of data collected with the LHCb detector. The decay is forbidden in the standard model but allowed in models with a Majorana neutrino. No signal is observed in either channel and limits of and are set at the 95% confidence level. These improve the previous best limits by factors of 40 and 30, respectively.
- Received 11 October 2011
DOI:https://doi.org/10.1103/PhysRevLett.108.101601
This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
© 2012 CERN, for the LHCb Collaboration