Journal
PHYSICS LETTERS B
Volume 827, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2022.137005
Keywords
Light-front quantization; Quantum electrodynamics; Photons; Parton distribution functions
Funding
- Chinese Academy of Sciences Presidents International Fellowship Initiative [2021PM0021, 2021PM0023]
- Institute of Modern Physics, Chinese Academy of Sciences [E129952YR0]
- Institute of Modern Physics, Chinese Academy of Sciences
- Key Research Program of Frontier Sciences, Chinese Academy of Sciences [ZDB-SLY-7020]
- Natural Science Foundation of Gansu Province, China [20JR10RA067]
- Strategic Priority Re-search Program of the Chinese Academy of Sciences [XDB34000000]
- SERB [SPF/2021/000102]
- Department of Energy [DE-FG02-87ER40371, DE-SC0018223]
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In this study, we calculate the TMDs and GPDs of the photon using light-front wave functions, showing excellent agreement with perturbative calculations.
We solve for the light-front wave functions (LFWFs) of the physical photon from the eigenvectors of the light-front quantum electrodynamics (QED) Hamiltonian with the aim to determine its bare photon and electron-positron Fock components. We then employ the resulting LFWFs to compute the transverse momentum dependent parton distributions (TMDs) and the generalized parton distributions (GPDs) at zero skewness of the photon. The TMDs are found to be in excellent agreement with the lowest-order perturbative results calculated using the electron-positron quantum fluctuation of the photon. The GPDs are also consistent with the perturbative calculations.(C) 2022 The Author(s). Published by Elsevier B.V.& nbsp;& nbsp;
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