On the deuteron relativistic charge distributions

TL;DR

This paper investigates relativistic charge distributions of a spin-1 target, specifically the deuteron, using a phase-space approach to understand frame dependence and relativistic effects on charge distortions.

Contribution

It introduces a phase-space method to analyze frame-dependent relativistic charge distributions for spin-1 particles, extending previous spin-1/2 studies.

Findings

Relativistic effects cause distortions in charge distributions when viewed from moving frames.

Deuteron exhibits milder frame dependence compared to the nucleon.

Spin-related kinematical effects are key to understanding charge distribution distortions.

Abstract

We study the relativistic 2D charge distributions in the case of a spin-$1$ target. These charge distributions are based on a phase-space approach allowing one to study their frame dependence, and hence to relate the familiar rest-frame picture with the light-front picture developed in the last two decades. Like in the spin-$1/2$ case, we show that relativistic kinematical effects associated with spin are responsible for the distortions of the charge distributions seen in a moving frame. Applying our results to the deuteron, we observe a mild frame dependence compared to the nucleon case.