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cc-by (c) Garrido Beltrán, Lluis et al., 2015
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/185689

Study of the rare View the MathML sourceBs0 and B0B0 decays into the π+π−μ+μ−π+π−μ+μ− final state

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A search for the rare decays B0 s → π +π −μ+μ− and B0 → π +π −μ+μ− is performed in a data set corresponding to an integrated luminosity of 3.0 fb−1 collected by the LHCb detector in proton- proton collisions at centre-of-mass energies of 7 and 8 TeV. Decay candidates with pion pairs that have invariant mass in the range 0.5-1.3 GeV/c2 and with muon pairs that do not originate from a resonance are considered. The first observation of the decay B0 s → π +π −μ+μ− and the first evidence of the decay B0 → π +π −μ+μ− are obtained and the branching fractions, restricted to the dipion-mass range considered, are measured to be B(B0 s → π +π −μ+μ−) = (8.6 ± 1.5 (stat) ± 0.7 (syst) ± 0.7 (norm)) × 10−8 and B(B0 → π +π −μ+μ−) = (2.11 ± 0.51 (stat) ± 0.15 (syst) ± 0.16 (norm)) × 10−8, where the third uncertainty is due to the branching fraction of the decay B0 → J /ψ(→ μ+μ−)K ∗(892)0(→ K +π −), used as a normalisation

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GARRIDO BELTRÁN, Lluís, GASCON, D., GRACIANI DÍAZ, Ricardo, GRAUGÉS POUS, Eugeni, MARIN BENITO, Carla, PICATOSTE OLLOQUI, Eduardo, RIVES MOLINA, Vicente josé, RUIZ, Hugo (ruiz pérez), LHCb Collaboration. Study of the rare View the MathML sourceBs0 and B0B0 decays into the π+π−μ+μ−π+π−μ+μ− final state. _Physics Letters B_. 2015. Vol. 743, núm. 46-55. [consulta: 8 de abril de 2026]. ISSN: 0370-2693. [Disponible a: https://hdl.handle.net/2445/185689]

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