English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

I review the basics of the collinear factorization theorem applied primarilyto deep inelastic scattering (DIS) involving forward parton distributions(PDFs) and the extensions of this theorem for exclusive processes probingnon-forward parton distributions (GPDs), the generalized distributionamplitudes (GDAs) and the transition distribution amplitudes (TDAs). These QCDfactorization theorem is an important tool in the description of hard processesin QCD. Whenever valid, it permits to represent the cross section or thescattering amplitude for such a process as a convolution in partonic momenta ofa perturbatively calculable part (the coefficient function, CF) which involvesthe hard scale of the process with non-perturbative (soft) distributions ofactive partons inside the hadrons involved in a process. The reliability of theperturbatively determined hard part together with high precision experimentaldata on relevant observables gives a hope for the possibility to uncover finedetails of interpartonic interactions and spatial distributions of partonsinside hadrons. I conclude with some remarks about QCD factorization withtransverse momentum dependent PDFs

QCD collinear factorization, its extensions and the partonic distributions