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  • Letter
  • Open Access

Two-photon transitions of charmonia on the light front

Yang Li1, Meijian Li2,3,4,*, and James P. Vary5

  • 1Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
  • 2Department of Physics, University of Jyvskyl, P.O. Box 35, Jyväskylä FI-40014, Finland
  • 3Helsinki Institute of Physics, University of Helsinki, P.O. Box 64, Helsinki FI-00014, Finland
  • 4Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, E-15782 Galicia, Spain
  • 5Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA

  • *mliy@jyu.fi
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Phys. Rev. D 105, L071901 – Published 11 April, 2022

DOI: https://doi.org/10.1103/PhysRevD.105.L071901

Abstract

We investigate the two-photon transitions Hcc¯→γ*γ of the charmonium system in light-front dynamics. The light-front wave functions were obtained from solving the effective Hamiltonian based on light-front holography and one-gluon exchange interaction within the basis light-front quantization approach. We compute the two-photon transition form factors as well as the two-photon decay widths for S- and P-wave charmonia, ηc and χcJ and their excitations. Without introducing any free parameters, our predictions are in good agreement with the recent experimental measurements by BABAR and Belle, shedding light on the relativistic nature of charmonium.

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Phys. Rev. D 105, L071901– Published 11 April, 2022
  • Received 30 December 2021
  • Accepted 9 March 2022
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