Masses and electromagnetic decay constants of ground and radially excited states of cc-bar and bb-bar pseudoscalar mesons

Heavy flavor mesons are of the type QQ-bar, or Qq-bar in which one of the quarks belongs to a heavy flavour such as c or b. Investigation of properties of these mesons gives a lot of information about heavy quark dynamics. Further, these studies should provide an important tool for exploring the structures of these simplest bound states in QCD, and for studies on non-perturbative behaviour of strong interactions. In this work we study the mass spectrum and leptonic decay constants of ground state (1S) and radial excitations (2S and 3S) of equal mass heavy pseudoscalar mesons such as η_c and η_b comprising of quark composition cc-bar and bb-bar