Garra Ticó, JordiGraugés Pous, EugeniBABAR Collaboration2019-04-052019-04-052008-01-111550-7998https://hdl.handle.net/2445/131559We present results of a search for the decays B 0 → ℓ + ℓ − γ ( ℓ = e or μ ). The search is performed using 320 × 10 6 B ¯¯¯ B pairs collected at the Υ ( 4 S ) resonance with the BABAR detector at the PEP-II B Factory at SLAC. We find no significant signal and set the following branching fraction upper limits at the 90% confidence level: B ( B 0 → e + e − γ ) < 1.2 × 10 − 7 and B ( B 0 → μ + μ − γ ) < 1.6 × 10 − 77 p.application/pdfeng(c) American Physical Society, 2008Física de partículesExperimentsParticle physicsExperimentsinfo:eu-repo/semantics/article5777182019-04-05info:eu-repo/semantics/openAccess