Search for Majorana neutrinos in B- → π+ μ- μ- decays.

Journal article

A search for heavy Majorana neutrinos produced in the B- → π+ μ- μ- decay mode is performed using 3  fb(-1) 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(B- → π+ μ- μ-) as functions of neutrino mass and lifetime. These limits are on the order of 10(-9) 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.

Authors: Aaij, R; Adeva, B; Adinolfi, M; Affolder, A; Ajaltouni, Z

• Publication status: Published
• Journal: Physical Review Letters
• Volume: 112
• Issue: 13
• Pages: 131802
• Publication date: 2014-04-01
• DOI: 10.1103/physrevlett.112.131802
• EISSN: 1079-7114
• ISSN: 0031-9007
• Language: English
• Keywords: LHCb Collaboration