Deuteron electromagnetic structure functions and polarization properties in soft-wall AdS/QCD

TL;DR

This paper uses a soft-wall AdS/QCD model to describe deuteron electromagnetic structure functions and polarization properties, successfully matching form factors and structure functions with QCD constraints.

Contribution

It introduces a novel application of soft-wall AdS/QCD to simultaneously model deuteron form factors and structure functions with consistent scale dependence.

Findings

Reproduces deuteron form factors and structure functions accurately

Demonstrates consistency with perturbative QCD constraints

Predicts the correct power-law behavior of form factors

Abstract

We apply a soft-wall AdS/QCD approach to the description of deuteron structure functions and tensor polarized properties. Present work is a completion of our previous study on electromagnetic form factors. By the appropriate choice of two couplings in the effective action we are able to reproduce both the form factors and structure functions in full consistency with model-independent constraints set by perturbative QCD. Our framework is based on a five-dimensional action in AdS space formulated in terms of vector fields dual to the deuteron and the electromagnetic fields. The AdS fields depend on four Minkowski and one holographic coordinate $z$. The scale dependence of the form factors and structure functions is consistent with quark counting rules implying the $1/Q^{10}$ behavior of the charge form factor $G_C(Q^2)$, structure functions $A(Q^2)$ and $B(Q^2)$, and the $1/Q^{12}$ behavior of the magnetic $G_M(Q^2)$ and quadrupole $G_Q(Q^2)$ form factors.