Unified and optimal frame choice for generalized parton distributions

TL;DR

This paper introduces a new optimized reference frame that unifies the analysis of generalized parton distributions, improving the interpretation of complex phase-space patterns in hadron structure studies.

Contribution

The paper presents a novel reference frame that enables a unified and clearer view of GPD-sensitive reactions, enhancing interpretability of phase-space patterns in nuclear physics.

Findings

New reference frame unifies GPD analysis across reactions

Reveals a quantum interference mechanism in hadron structure

Facilitates separation of physical scales in GPD studies

Abstract

Reconstructing the internal three-dimensional quark and gluon structures of hadrons through generalized parton distributions (GPDs) from hard exclusive scattering processes is one of the most challenging tasks in nuclear and particle physics. In this paper, we introduce a new optimized reference frame that, for the first time, enables a unified view of all the reactions sensitive to GPDs and facilitates the interpretation of a variety of phase-space patterns that were previously hardly accessible and interpretable. Similarly to how the heliocentric description advanced our understanding of the solar system and gravitation, our new frame centers around a quasireal state, allows for a consistent separation of physical scales, and reveals a novel quantum interference mechanism.