2026-04-17T04:22:52Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1864142025-12-05T16:43:04Zcom_2072_1057col_2072_478823col_2072_478917

00925njm 22002777a 4500 dc Badalov, A. author Garrido Beltrán, Lluís author Gascón Fora, David author Graciani Diaz, Ricardo author Graugés Pous, Eugeni author Marin Benito, Carla author Picatoste Olloqui, Eduardo author Rives Molina, Vicente José author LHCb Collaboration author 2022-06-07T14:17:27Z 2022-06-07T14:17:27Z 2016 2022-06-07T14:17:27Z The Λ0 b → Λφ decay is observed using data corresponding to an integrated luminosity of 3.0 fb−1 recorded by the LHCb experiment. The decay proceeds at leading order via a b → sss loop transition and is therefore sensitive to the possible presence of particles beyond the Standard Model. A first observation is reported with a significance of 5.9 standard deviations. The value of the branching fraction is measured to be (5.18 ± 1.04 ± 0.35 +0.67 −0.62) × 10−6, where the first uncertainty is statistical, the second is systematic, and the third is related to external inputs. Triple-product asymmetries are measured to be consistent with zero. Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments Observation of the Λb0→Λφ decay