• Open Access

Search for Majorana Neutrinos in Bπ+μμ Decays

R. Aaij et al. (LHCb Collaboration)
Phys. Rev. Lett. 112, 131802 – Published 3 April 2014

Abstract

A search for heavy Majorana neutrinos produced in the Bπ+μμ decay mode is performed using 3fb1 of integrated luminosity collected with the LHCb detector in pp collisions at center-of-mass energies of 7 and 8 TeV at the LHC. Neutrinos with masses in the range 250 to 5000 MeV and lifetimes from zero to 1000 ps are probed. In the absence of a signal, upper limits are set on the branching fraction B(Bπ+μμ) as functions of neutrino mass and lifetime. These limits are on the order of 109 for short neutrino lifetimes of 1 ps or less. Limits are also set on the coupling between the muon and a possible fourth-generation neutrino.

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  • Received 21 January 2014

DOI:https://doi.org/10.1103/PhysRevLett.112.131802

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.

© 2014 CERN, for the LHCb collaboration

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Vol. 112, Iss. 13 — 4 April 2014

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