Mesonic bound states having both heavy quark and antiquark (cc ,bb and cb ) are among the best tools for understanding the quantum chromodynamics. Many experimental groups such as CLEO, LEP, CDF and NA50 have provided several data. BABAR, Belle, ATLAS, CMS and LHC are producing and expected to produce more precise data in the upcoming experiments. The heavy quarkonia have very rich spectroscopy with narrow and experimentally characterized states. The potential between the interacting quarks within hadron demands the understanding of the underlying physics of strong interactions. There are...