Pseudoscalar charmonia masses and its digamma decay width with QCD correction

In this paper we have computed mass spectra of charmonium by solving the Dirac equation. The results have been compared with experimental results with other available theoretical results. Spin spin interactions are also incorporated in the calculation of pseudoscalar masses of charmonium. With the help of three parameters this model generates S-wave masses of the charmonium. In present study we have computed the digamma decay width for charmonium with the inclusion of QCD correction.