Universality of Generalized Parton Distributions in Light-Front Holographic QCD.

Guy F De Téramond,Hans Günter Dosch,Stanley J Brodsky,Alexandre Deur,Raza Sabbir Sufian,Tianbo Liu

doi:10.1103/physrevlett.120.182001

Abstract

The structure of generalized parton distributions is determined from light-front holographic QCD up to a universal reparametrization function w(x) which incorporates Regge behavior at small x and inclusive counting rules at x→1. A simple ansatz for w(x) that fulfills these physics constraints with a single-parameter results in precise descriptions of both the nucleon and the pion quark distribution functions in comparison with global fits. The analytic structure of the amplitudes leads to a connection with the Veneziano model and hence to a nontrivial connection with Regge theory and the hadron spectrum.

Highlights

Guy F. de Teramond,1 Tianbo Liu,2,3 Raza Sabbir Sufian,2 Hans Günter Dosch,4 Stanley J
The structure of generalized parton distributions is determined from light-front holographic QCD up to a universal reparametrization function wðxÞ which incorporates Regge behavior at small x and inclusive counting rules at x → 1
Since a precise knowledge of PDFs is required for the analysis and interpretation of the scattering experiments in the LHC era, considerable efforts have been made to determine PDFs and their uncertainties by global fitting collaborations such as MMHT [5], CT [6], NNPDF [7], and HERAPDF [8]

Summary

Introduction

Guy F. de Teramond,1 Tianbo Liu,2,3 Raza Sabbir Sufian,2 Hans Günter Dosch,4 Stanley J. The structure of generalized parton distributions is determined from light-front holographic QCD up to a universal reparametrization function wðxÞ which incorporates Regge behavior at small x and inclusive counting rules at x → 1.

Results

Conclusion