Unintegrated gluon distributions from the color dipole cross section in the BGK saturation model
Abstract
We evaluate the unintegrated gluon distribution of the proton starting from a parametrization of the color dipole cross section including Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) evolution and saturation effects. To this end, we perform the Fourier-Bessel transform of σ (x , r) / α (r). At large transverse momentum of gluons we match the so-obtained distribution to the logarithmic derivative of the collinear gluon distribution. We check our approach by calculating the proton structure function FL (x ,Q2) finding good agreement with HERA data.
- Publication:
-
Physics Letters B
- Pub Date:
- December 2022
- DOI:
- 10.1016/j.physletb.2022.137582
- arXiv:
- arXiv:2210.02877
- Bibcode:
- 2022PhLB..83537582L
- Keywords:
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- High Energy Physics - Phenomenology
- E-Print:
- 4 pages, 3 figs