Leptonic, photonic and gluonic decay of S-wave charmonium

In 1974, the J/ψ particle was discovered experimentally, which is identify as first bound state of charm (c) quark and its anti-particle (𝑐̅). Theoretically, the study of spectroscopy and decay properties of bound states using non-relativistic quark model acquired a renewed interest due to the available experimental facilities like LHCb, Belle, BaBar, DELPHI, CLEO, etc. that have been continuously providing new and accurate information about the hadrons. Study of decay properties of quarkonia (𝑄𝑄̅) decays into leptons, photons or gluons is very useful for the production, identification of resonances, as well as to recognize conventional meson and multiquark structure. In this present paper, the mass spectra and decay rate of leptonic, photonic and gluonic decays of charmonium state 𝑐𝑐̅ (both vector and scalar meson) are computed by using a quark-antiquark non-relativistic model by solving the Schrödinger equation using variational method