LHCb CollaborationAbellan Beteta, CarlosCalvo Gomez, MiriamCamboni, AlessandroComerma Montells, AlbertGarrido Beltrán, LluísGraciani Díaz, RicardoGraugés Pous, EugeniLópez Asamar, EliasOyanguren Campos, Arantza dePérez-Calero Yzquierdo, AntonioPicatoste Olloqui, EduardoPotterat, CédricRives Molina, Vicente JoséRuiz, Hugo (Ruiz Pérez)Ruiz Valls, PabloVázquez Gómez, RicardVilasis-Cardona, Xavier2023-04-132023-04-132013-080370-2693https://hdl.handle.net/2445/196728A search for the rare decay D0 → μ+μ− is performed using a data sample, corresponding to an integrated luminosity of 0.9 fb−1, of pp collisions collected at a centre-of-mass energy of 7 TeV by the LHCb experiment. The observed number of events is consistent with the background expectations and corresponds to an upper limit of B(D0 → μ+μ−) < 6.2 (7.6) × 10−9 at 90% (95%) confidence level. This result represents an improvement of more than a factor twenty with respect to previous measurements10 p.application/pdfengcc by-nc-nd (c) CERN, 2013https://creativecommons.org/licenses/by-nc-nd/4.0/Física de partículesExperimentsCromodinàmica quànticaParticle physicsExperimentsQuantum chromodynamicsinfo:eu-repo/semantics/article6290102023-04-13info:eu-repo/semantics/openAccess