The decay J/ψ  →  γX ( J P ) →  γϕϕ : Dynamical analysis of the X ( J P ) →  ϕϕ resonance contributions

• Published in: EPJ Web of Conferences Vol. 212; p. 3005
• Main Author: Kozhevnikov, A.A.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Les Ulis EDP Sciences 2019
• Subjects: Decay; Resonance
• ISSN: 2100-014X; 2101-6275; 2100-014X
• DOI: 10.1051/epjconf/201921203005

The dynamics of the J PC = 0 -+ ,0 ++ , and 2 ++ resonance contributions to the decay $ J/\psi {\rm{ }} \to {\rm{ }}\gamma X\left( {{J^P}} \right) \to {\rm{ }}\gamma \phi \phi $ is analysed using the data obtained by BESIII collaboration. The effective coupling constants parameterising invariant amplitudes of the transitions $ J/\psi {\rm{ }} \to {\rm{ }}\gamma X\left( {{J^{PC}}} \right) $ and $ X\left( {{J^P}} \right) \to {\rm{ }}\phi \phi $ and masses $ X\left( {{J^P}} \right) $ of found from the fits are used to plot $ \phi \phi $ the mass spectrum of each J PC component.