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: | 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 |
Keywords: | Hadrons Partícules (Física nuclear) Acceleradors de partícules Hadrons Particles (Nuclear physics) Particle accelerators |
Issue Date: | 18-Aug-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 |
URI: | http://hdl.handle.net/2445/113840 |
Related resource: | https://doi.org/10.1103/PhysRevLett.117.082003 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) |
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