2026-04-13T13:29:04Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1857322025-12-05T17:02:01Zcom_2072_1057col_2072_478823col_2072_478917

00925njm 22002777a 4500 dc Baladov, A. author Casanova Mohr, R. author Garrido Beltrán, Lluís author Gascon, D. author Graciani Diaz, Ricardo author Graugés Pous, Eugeni author Marin Benito, Carla author Picatoste Olloqui, Eduardo author Rives Molina, Vicente José author Ruiz, Hugo (Ruiz Pérez) author LHCb Collaboration author 2022-05-17T16:17:05Z 2022-05-17T16:17:05Z 2015-09-01 2022-05-17T16:17:05Z : A search is performed for the as yet unobserved baryonic Λ0 b → Λη 0 and Λ 0 b → Λη decays with 3 fb−1 of proton-proton collision data recorded by the LHCb experiment. The B0 → K0 sη 0 decay is used as a normalisation channel. No significant signal is observed for the Λ0 b → Λη 0 decay. An upper limit is found on the branching fraction of B(Λ0 b → Λη 0 ) < 3.1 × 10−6 at 90% confidence level. Evidence is seen for the presence of the Λ0 b → Λη decay at the level of 3σ significance, with a branching fraction B(Λ0 b → Λη) = (9.3 +7.3 −5.3 ) × 10−6 . Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments Search for the Λ b 0  → Λη ′ and Λ b 0  → Λη decays with the LHCb detector