Understanding the nature of the exotic XYZ resonances is one of the open problems in hadronic spectroscopy. Despite the experimental efforts, the structure of these particles still lacks of an accepted theoretical framework. We propose to use the $Z_c^(\prime) \to \eta_c \rho$ decays as a possible discriminant between two of the most popular models: the compact tetraquark and the loosely bound meson molecule. We show that the predictions obtained within the two pictures are significantly different and therefore the proposed decay channel might shed some light on the nature of these states.
The Zc(')- > ηc ρ decay as a discriminant between tetraquarks and meson molecules / Angelo, Esposito; Andrea, L. Guerrieri; Pilloni, Alessandro. - ELETTRONICO. - (2015). (Intervento presentato al convegno 7th International Workshop on Charm Physics (CHARM 2015) tenutosi a Detroit, USA nel 18 Maggio-22 Maggio 2015).
The Zc(')- > ηc ρ decay as a discriminant between tetraquarks and meson molecules
Angelo, Esposito;PILLONI, ALESSANDRO
2015
Abstract
Understanding the nature of the exotic XYZ resonances is one of the open problems in hadronic spectroscopy. Despite the experimental efforts, the structure of these particles still lacks of an accepted theoretical framework. We propose to use the $Z_c^(\prime) \to \eta_c \rho$ decays as a possible discriminant between two of the most popular models: the compact tetraquark and the loosely bound meson molecule. We show that the predictions obtained within the two pictures are significantly different and therefore the proposed decay channel might shed some light on the nature of these states.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.