2026-04-17T14:16:48Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1336912025-12-04T21:32:16Zcom_2072_1057col_2072_478812col_2072_478823col_2072_478904col_2072_478917

RECERCAT author Abellan Beteta, Carlos author Calvo Gómez, Míriam author Camboni, Alessandro author Comerma Montells, Albert author Domingo Bonal, Francesc author Garrido Beltrán, Lluís author Gascón Fora, David author Grabalosa Gándara, Marc author Graciani Díaz, Ricardo author Graugés Pous, Eugeni author López Asamar, Elias author Pérez-Calero Yzquierdo, Antonio author Picatoste Olloqui, Eduardo author Pie Valls, B. (Blai) author Potterat, Cédric author Puig Navarro, Albert author Roselló, M. author Ruiz, Hugo (Ruiz Pérez) author Vázquez Gómez, Ricard author Vilasis-Cardona, Xavier author LHCb Collaboration 2019-05-22T11:03:22Z2019-05-22T11:03:22Z2012-06-052019-05-22T11:03:22Z A search for B 0 s → μ + μ − and B 0 → μ + μ − decays is performed using 1.0 fb − 1 of p p collision data collected at √ s = 7 TeV with the LHCb experiment at the Large Hadron Collider. For both decays, the number of observed events is consistent with expectation from background and standard model signal predictions. Upper limits on the branching fractions are determined to be B ( B 0 s → μ + μ − ) < 4.5 ( 3.8 ) × 10 − 9 and B ( B 0 → μ + μ − ) < 1.0 ( 0.81 ) × 10 − 9 at 95% (90%) confidence level. cc by (c) CERN; LHCb Collaboration, 2012 http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Física de partícules Experiments Particle physics Experiments Strong Constraints on the Rare Decays B0s→μ+μ− and B0→μ+μ− info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion