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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/113840
Evidence for Exotic Hadron Contributions to Λb0 →j /ψpπ- Decays
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A full amplitude analysis of Λ0b→J/ψpπ− decays is performed with a data sample acquired with the LHCb detector from 7 and 8 TeV pp collisions, corresponding to an integrated luminosity of 3 fb−1. A significantly better description of the data is achieved when, in addition to the previously observed nucleon excitations N→pπ−, either the Pc(4380)+ and Pc(4450)+→J/ψp states, previously observed in Λ0b→J/ψpK− decays, or the Zc(4200)−→J/ψπ− state, previously reported in B0→J/ψK+π− decays, or all three, are included in the amplitude models. The data support a model containing all three exotic states, with a significance of more than three standard deviations. Within uncertainties, the data are consistent with the Pc(4380)+ and Pc(4450)+ production rates expected from their previous observation taking account of Cabibbo suppression.
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GARRIDO BELTRÁN, Lluís, GASCÓN FORA, David, GRACIANI DÍAZ, Ricardo, GRAUGÉS POUS, Eugeni, MARIN BENITO, Carla, PICATOSTE OLLOQUI, Eduardo, RIVES MOLINA, Vicente josé, BADALOV, Alexey, LHCb Collaboration. Evidence for Exotic Hadron Contributions to Λb0 →j /ψpπ- Decays. _Physical Review Letters_. 2016. Vol. 117, núm. 82003. [consulta: 23 de gener de 2026]. ISSN: 0031-9007. [Disponible a: https://hdl.handle.net/2445/113840]