Camboni, AlessandroCoquereau, S.Garrido Beltrán, LluísGascon, D.Graciani Díaz, RicardoGraugés Pous, EugeniMarin Benito, CarlaPicatoste Olloqui, EduardoRives Molina, Vicente JoséLHCb Collaboration2022-06-072022-06-072017-031126-6708https://hdl.handle.net/2445/186402A search for the non-resonant decays B s 0 → μ + μ - μ + μ - and B 0 → μ + μ - μ + μ - is presented. The measurement is performed using the full Run 1 data set collected in proton-proton collisions by the LHCb experiment at the LHC. The data correspond to integrated luminosities of 1 and 2 fb-1 collected at centre-of-mass energies of 7 and 8 TeV, respectively. No signal is observed and upper limits on the branching fractions of the non-resonant decays at 95% confidence level are determined to be B({B}_s^0\to {μ}+{μ}-{μ}+{μ}-)<2.5× 1{0}^{-9}, B({B}^0\to {μ}+{μ}-{μ}+{μ}-)<6.9× 1{0}^{-10}. [Figure not available: see fulltext.]19 p.application/pdfengcc-by (c) Camboni, Alessandro et al., 2017https://creativecommons.org/licenses/by/4.0/HadronsGran Col·lisionador d'HadronsFísica de partículesExperimentsHadronsLarge Hadron Collider (France and Switzerland)Particle physicsExperimentsinfo:eu-repo/semantics/article6779782022-06-07info:eu-repo/semantics/openAccess