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

TL;DR

This paper investigates the tetramixing of pseudoscalar and vector mesons within a light-cone quark model, revealing a natural source of intrinsic charm in light mesons and explaining certain decay processes.

Contribution

It introduces a novel tetramixing framework for mesons, providing insights into intrinsic charm components and decay mechanisms without gluon or photon intermediates.

Findings

Mixing matrices and transition form factors match experimental data.

Enhanced understanding of J/ψ decay channels.

Identification of intrinsic charm sources in light mesons.

Abstract

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 $c\bar{c}$ 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.