Pomeron dynamics in the AdS space and structure functions of hadrons at small x

TL;DR

This paper explores Pomeron dynamics in AdS space using holographic QCD to model small x deep inelastic scattering, successfully matching experimental structure function data for protons and pions.

Contribution

It introduces a holographic approach to describe small x DIS via graviton exchange in AdS space, providing a novel theoretical framework for Pomeron dynamics.

Findings

Calculated structure functions $F_2^p$, $F_2^$, and $F_L^p$ agree with experimental data.

Explained the origin of differences between $F_2$ and $F_L$ within the holographic model.

Abstract

The Pomeron dynamics is investigated via deep inelastic scattering (DIS) at small x in the framework of holographic quantum chromodynamics. The small x DIS process is assumed to be described by the graviton exchange between external vector current and hadron in the AdS space. Our calculations for $F_2^p$, $F_2^\pi$, as well as the longitudinal counterpart $F_L^p$ are consistent with the experimental data. We discuss origins of a difference between $F_2$ and $F_L$ in our approach.