2026-04-17T05:53:56Zhttps://recercat.cat/oai/request
oai:recercat.cat:2445/1853712025-12-05T16:41:56Zcom_2072_1057col_2072_478823col_2072_478917
RECERCAT author Alfonso Albero, Alejandro author Calvo Gómez, Míriam author Camboni, Alessandro author Coquereau, Samuel author Garrido Beltrán, Lluís author Gascón Fora, David author Graciani Díaz, Ricardo author Graugés Pous, Eugeni author Marin Benito, Carla author LHCb Collaboration 2022-05-04T16:18:36Z2022-05-04T16:18:36Z20182022-05-04T16:18:36Z The Λ0 b baryon is the isospin-singlet ground state of a bound system of a beauty quark and two light quarks. The high production rate of b quarks at the Large Hadron Collider (LHC) [1-5], along with the excellent mass resolution and hadron-identification capabilities of the LHCb detector, give access to a variety of decay channels of the Λ0 b baryon, including multibody, rare, charmless and semileptonic decays [6-25]. The high signal yield of the Λ0 b → J/ψpK− decay [15] facilitated a precise measurement of the Λ0 b lifetime [26], while the relatively low energy released in the Λ0 b→ ψ(2S)pK− and Λ0 b→ χcpK− decays allowed for precise measurements of the Λ0 b mass [16, 22]. A six-dimensional amplitude analysis of the Λ0 b → J/ψpK− decay resulted in the observation of the Pc(4380)+ and Pc(4450)+ pentaquark states decaying into the J/ψp final state [27]. Later, these states were confirmed using a model-independent technique [28]. Subsequently, an analysis of Cabibbo-suppressed Λ0 b → J/ψpπ − decays found evidence for contributions from the Pc(4380)+ and Pc(4450)+ pentaquarks and from the Zc(4200)− tetraquark [29]. cc-by (c) LHCb Collaboration (UB: Alfonso Albero, A. et al., 2018 https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments Observation of the decay Λ b 0 → ψ(2S)pπ− info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion