Tetramixing of vector and pseudoscalar mesons: A source of intrinsic quarks

The tetramixing of pseudoscalar mesons pi-eta-eta'-eta(c) and vector mesons omega-rho-phi-J/psi are studied in the light-cone constituent quark model, and such mixing of four mesons provides a natural source for the intrinsic charm c (c) over bar components of light mesons. By mixing with the light mesons, the charmonium states J/psi and eta(c) could decay into light mesons more naturally, without introducing gluons or a virtual photon as intermediate states. Thus, the introduction of light quark components into J/psi is helpful to reproduce the new experimental data of J/psi decays. The mixing matrices and the Q(2) behaviors of the transition form factors are also calculated and compared with experimental data.