QED radiative correction to spin-density matrix elements in exclusive vector meson production

TL;DR

This paper analyzes QED radiative effects on the measurement of spin-density matrix elements in diffractive rho-meson electroproduction, highlighting significant corrections at collider energies like HERA.

Contribution

It provides the first detailed calculation of QED radiative corrections to spin-density matrix elements in exclusive vector meson production.

Findings

Large radiative correction for r^5_{00} at HERA energies

QED effects significantly impact the measurement accuracy

Results inform future experimental analyses

Abstract

QED radiative effects are considered in the case of measurement of spin-density matrix elements of diffractive $\rho$-meson electroproduction. Large radiative correction for $r^5_{00}$ is found in the kinematics of collider experiments at HERA.