https://doi.org/10.1140/epja/s10050-025-01527-3
Regular Article - Theoretical Physics
Photon Leading Twist Transverse Momentum Dependent Parton Distributions
1
Computational High Energy Physics Lab, Department of Physics, Dr. B R Ambedkar National Institute of Technology, 144008, Jalandhar, Punjab, India
2
Computational Theoretical High Energy Physics Lab, Department of Physics, Doaba College, 144004, Jalandhar, Punjab, India
Received:
19
September
2024
Accepted:
21
February
2025
Published online:
18
March
2025
In this work, we have calculated the photon leading-twist T-even transverse momentum dependent parton distribution functions (TMDs). For these calculations, we have treated photon as a state of quark anti-quark pair and represent the TMDs in explicit form of helicity amplitudes. We have presented all the T-even TMDs for the photon being massless (real) and massive (virtual). We have also compared our longitudinally and transversely polarized TMDs results for different photon masses. The collinear parton distribution functions (PDFs) have been predicted for both the real and virtual photon cases. The results for the unpolarized PDF of our calculations are in good agreement with other model predictions. In addition to this, we have also discussed the spin-spin correlations between the quark and photon.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
