Alfonso Albero, AlejandroCalvo Gómez, MíriamCamboni, AlessandroCoquereau, SamuelGarrido Beltrán, LluísGascón Fora, DavidGraciani Díaz, RicardoGraugés Pous, EugeniMarin Benito, CarlaLHCb Collaboration2022-05-042022-05-0420181126-6708https://hdl.handle.net/2445/185371The 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].18 p.application/pdfengcc-by (c) LHCb Collaboration (UB: Alfonso Albero, A. et al., 2018https://creativecommons.org/licenses/by/4.0/HadronsGran Col·lisionador d'HadronsFísica de partículesExperimentsHadronsLarge Hadron Collider (France and Switzerland)Particle physicsExperimentsinfo:eu-repo/semantics/article6845982022-05-04info:eu-repo/semantics/openAccess