Abellan Beteta, CarlosCalvo Gómez, MíriamCamboni, AlessandroComerma Montells, AlbertDomingo Bonal, FrancescGarrido Beltrán, LluísGascón Fora, DavidGrabalosa Gándara, MarcGraciani Díaz, RicardoGraugés Pous, EugeniLópez Asamar, EliasMusy, MarcoPérez-Calero Yzquierdo, AntonioPicatoste Olloqui, EduardoPie Valls, B. (Blai)Potterat, CédricPuig Navarro, AlbertRoselló, M.Ruiz, Hugo (Ruiz Pérez)Vázquez Gómez, RicardVilasis-Cardona, XavierLHCb Collaboration2019-04-082019-04-082012-06-011550-7998https://hdl.handle.net/2445/131778Searches for heavy Majorana neutrinos in B − decays in final states containing hadrons plus a μ − μ − pair have been performed using 0.41     fb − 1 of data collected with the LHCb detector in proton-proton collisions at a center-of-mass energy of 7 TeV. The D + μ − μ − and D * + μ − μ − final states can arise from the presence of virtual Majorana neutrinos of any mass. Other final states containing π + , D + s , or D 0 π + can be mediated by an on-shell Majorana neutrino. No signals are found and upper limits are set on Majorana neutrino production as a function of mass, and also on the B − decay branching fractions.13 p.application/pdfeng(c) American Physical Society, 2012Física de partículesExperimentsNeutrinsParticle physicsExperimentsNeutrinosinfo:eu-repo/semantics/article6189772019-04-08info:eu-repo/semantics/openAccess