# Exclusive Hard Diffraction at HERA (DVCS and Vector Mesons)

## TL;DR

This paper reviews recent HERA results on deeply virtual Compton scattering and vector meson production, focusing on the transition from soft to hard diffraction and the associated spin dynamics.

## Contribution

It provides a comprehensive overview of experimental findings related to the transition from soft to hard diffraction at HERA, highlighting spin effects.

## Key findings

- Evidence of transition from soft to hard diffraction
- Insights into spin dynamics in exclusive processes
- Enhanced understanding of QCD in diffractive scattering

## Abstract

Recent results obtained at HERA on deeply virtual Compton scattering and exclusive vector meson production are reviewed, with the emphasis on the transition from soft to hard diffraction and on spin dynamics.