Use this identifier to quote or link this document: http://hdl.handle.net/2072/376172

Title:	Search for Majorana Neutrinos in B−→π+μ−μ− Decays
Author:	Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN
Other authors:	Universitat Ramon Llull. La Salle; CERN
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.
Publication date:	2014-04-03
Subject (UDC):	53 - Física
Subject(s):	Gran col·lisionador d'hadrons (França i Suïssa) Partícules (Física nuclear) Col·lisions (Física nuclear)
Rights:	L'accés als continguts d'aquest document queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons:http://creativecommons.org/licenses/by/4.0/ © CERN
Pages:	8 p.
Document type:	Article Article - Published version
DOI:	https://doi.org/10.1103/PhysRevLett.112.131802
Published by:	American Physical Society
Publish at:	Physical Review Letters, 2014, Vol. 112, No. 13 (Abril)
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