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Coupled-channel interpretation of the LHCb double-$J/\psi$ spectrum and hints of a new state near the $J/\psi J/\psi$ threshold

Recently, the LHCb Collaboration reported pronounced structures in the invariant mass spectrum of J/ψ pairs produced in proton-proton collisions at the Large Hadron Collider. In this Letter, we argue that the data can be very well described within two variants of a coupled-channel approach employing...

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Detalles Bibliográficos
Autores principales:	Dong, Xiang-Kun, Baru, Vadim, Guo, Feng-Kun, Hanhart, Christoph, Nefediev, Alexey
Lenguaje:	eng
Publicado:	2020
Materias:	nucl-th Nuclear Physics - Theory hep-lat Particle Physics - Lattice hep-ex Particle Physics - Experiment hep-ph Particle Physics - Phenomenology
Acceso en línea:	https://dx.doi.org/10.1103/PhysRevLett.126.132001 https://dx.doi.org/10.1103/PhysRevLett.127.119901 http://cds.cern.ch/record/2759264

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