Predictions for the Sivers Single-Spin Asymmetry from Holographic QCD

TL;DR

This paper uses holographic light-front QCD to predict the Sivers single-spin asymmetry and transverse momentum distributions for the proton, linking nonperturbative hadron structure to observable spin effects.

Contribution

It introduces a novel application of holographic QCD to predict spin-dependent asymmetries in proton structure, connecting hadron spectroscopy with experimental observables.

Findings

Predicted Sivers asymmetry for the proton.

Calculated transverse momentum distributions.

Linked hadron spectroscopy to spin asymmetry predictions.

Abstract

A new approach to nonperturbative QCD, holographic light-front QCD, provides a comprehensive model for hadron dynamics and spectroscopy, incorporating color confinement, a universal hadron mass scale, the prediction of a massless pion in the chiral limit, and connections between the spectroscopy of mesons, baryons and tetraquarks across the full hadron spectrum. In this article we present predictions for the Sivers asymmetry and related transverse momentum distributions for the proton based on the light-front wavefunctions of the baryon eigenstate predicted by holographic QCD.