Extraction of gluon distributions from structure functions at small x in holographic QCD

Understand

We investigate the nucleon and pion gluon distribution functions in the framework of holographic QCD, focusing on the small Bjorken x region.

• Based on an approximate relation, the gluon distributions are extracted from structure functions of the unpolarized deep inelastic scattering which can be calculated with a holographic QCD model, assuming the Pomeron exchange.
• All the adjustable parameters of the model are determined with the HERA data of the proton structure functions.
• We explicitly show that the extracted proton gluon distribution is consistent with results of the recent global QCD analysis.