Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/113840
Title: Evidence for Exotic Hadron Contributions to Λb0 →j /ψpπ- Decays
Author: LHCb collaboration
Garrido Beltrán, Lluís
Gascón Fora, David
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
Marin Benito, C.
Picatoste Olloqui, Eduardo
Rives Molina, Vicente José
Badalov, A.
Keywords: Hadrons
Partícules (Física nuclear)
Acceleradors de partícules
Hadrons
Particles (Nuclear physics)
Particle accelerators
Issue Date: 2016
Publisher: American Physical Society
Abstract: 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.
Note: Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.117.082003
It is part of: Physical Review Letters, 2016, vol. 117, num. 82003
Related resource: https://doi.org/10.1103/PhysRevLett.117.082003
URI: http://hdl.handle.net/2445/113840
ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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