PoS - Proceedings of Science
Volume 374 - Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions (LC2019) - Contributed
Positronium: an illustration of nonperturbative renormalization in a basis light-front approach
X. Zhao,* K. Fu, H. Zhao, J. Vary
*corresponding author
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Pre-published on: May 19, 2020
Published on: May 26, 2020
We calculate the mass spectrum and the structure of the positronium system at a strong coupling in a basis light-front approach. We start from the light-front QED Hamiltonian and retain one dynamical photon in our basis. We perform the fermion mass renormalization associated with the nonperturbative fermion self-energy correction. We present the resulting mass spectrum and wave functions for the selected low-lying states. Next, we apply this approach to QCD and calculate the heavy meson system with one dynamical gluon retained. We illustrate the obtained mass spectrum and wave functions for the selected low-lying states.
DOI: https://doi.org/10.22323/1.374.0090
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