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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, et al. Evidence for Exotic Hadron Contributions to Λb0 →j /ψpπ- Decays. Physical Review Letters. 2016. Vol. 117, num. 82003. ISSN 0031-9007. [consulted: 11 of August of 2026]. Available at: https://hdl.handle.net/2445/113840