Interpretation of the LHCb $P_c$(4312)$^+$ Signal

We study the nature of the new signal reported by LHCb in the J/ψp spectrum. Based on the S-matrix principles, we perform a minimum-bias analysis of the underlying reaction amplitude, focusing on the analytic properties that can be related to the microscopic origin of the Pc(4312)+ peak. By explorin...

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Detalles Bibliográficos
Autores principales: Fernández-Ramírez, C., Pilloni, A., Albaladejo, M., Jackura, A., Mathieu, V., Mikhasenko, M., Silva-Castro, J.A., Szczepaniak, A.P.
Lenguaje:eng
Publicado: 2019
Materias:
hep-ex
Particle Physics - Experiment
hep-ph
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.123.092001
http://cds.cern.ch/record/2673776
Descripción
Sumario:We study the nature of the new signal reported by LHCb in the J/ψp spectrum. Based on the S-matrix principles, we perform a minimum-bias analysis of the underlying reaction amplitude, focusing on the analytic properties that can be related to the microscopic origin of the Pc(4312)+ peak. By exploring several amplitude parametrizations, we find evidence for the attractive effect of the Σc+D¯0 channel, which is not strong enough, however, to form a bound state.

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