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.

R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, J. Albrecht, et al. (2014). Search for Majorana Neutrinos in B− → π+ μ− μ− Decays. PHYSICAL REVIEW LETTERS, 112(13), 1-8 [10.1103/PhysRevLett.112.131802].

Search for Majorana Neutrinos in B− → π+ μ− μ− Decays

CARBONE, ANGELO;GALLI, DOMENICO;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2014

Abstract

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.
2014
R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, J. Albrecht, et al. (2014). Search for Majorana Neutrinos in B− → π+ μ− μ− Decays. PHYSICAL REVIEW LETTERS, 112(13), 1-8 [10.1103/PhysRevLett.112.131802].
R. Aaij; B. Adeva; M. Adinolfi; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A.A. Alves...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/265512
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