Nonforward Compton scattering in AdS/CFT correspondence

TL;DR

This paper investigates deeply virtual Compton scattering within the AdS/CFT framework, calculating various supergravity contributions, comparing theoretical cross sections to experimental data, and analyzing the dominance of graviton exchange at high energies.

Contribution

It introduces a detailed AdS/CFT-based calculation of nonforward Compton scattering, including s-channel, u-channel, and t-channel contributions, and compares results with experimental data.

Findings

Good agreement with H1 and ZEUS DVCS data

t-channel graviton exchange dominates at high energies

Calculations extend AdS/CFT applications to real-world scattering processes

Abstract

We study the nonforward Compton scattering in particular the deeply virtual Compton scattering from AdS/CFT. We first calculate the contributions from the s-channel and u-channel supergravity diagrams as well as the four point interaction diagram which correspond to the Compton scatterings on a dilaton target in CFT. Furthermore, we study the Compton scattering on a dilatino target. Assuming that protons can be identified as supergravity modes of dilatino, we compare the calculated DVCS cross section to the low-energy experimental data from the H1 and ZEUS collaborations and find good agreement. We also discuss the t-channel graviton exchange contribution and show that it should be dominant in the high-energy limit.