Abstract
I study the behavior of the gauge-invariant gluon bi-local operator with space- like separation at large longitudinal distances. Performing the Fourier transform, I also calculate the behavior of the pseudo and quasi gluon PDF at low Bjorken x and compare it with the leading and next-to-leading twist approximation. I show that the pseudo-PDF and quasi-PDF are very different at this regime and that the higher twist corrections of the quasi-PDF come in not as inverse powers of P but as inverse powers of xBP.
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Chirilli, G.A. Pseudo and quasi gluon PDF in the BFKL approximation. J. High Energ. Phys. 2022, 64 (2022). https://doi.org/10.1007/JHEP03(2022)064
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DOI: https://doi.org/10.1007/JHEP03(2022)064