Search for Majorana Neutrinos in B[superscript −] → π[superscript +]μ[superscript −]μ[superscript −] Decays
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Counts, Ian Thomas Hunt; Williams, Michael; Ilten, Philip J![Thumbnail](/bitstream/handle/1721.1/88715/Aaij-2014-Search%20for%20majorana%20neutrinos.pdf.jpg?sequence=6&isAllowed=y)
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A search for heavy Majorana neutrinos produced in the B[superscript −] → π[superscript +]μ[superscript −]μ[superscript −] decay mode is performed using 3 fb[superscript −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[superscript −] → π[superscript +]μ[superscript −]μ[superscript −]) as functions of neutrino mass and lifetime. These limits are on the order of 10[superscript −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.
Date issued
2014-04Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaij, R., B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, et al. “Search for Majorana Neutrinos in B[superscript −] → π[superscript +]μ[superscript −]μ[superscript −] Decays.” Physical Review Letters 112, no. 13 (April 2014). © 2014 CERN, for the LHCb collaboration
Version: Final published version
ISSN
0031-9007
1079-7114