Prompt-photon production in DIS

TL;DR

This paper reports measurements of prompt-photon production cross sections in deep inelastic ep scattering at HERA, comparing experimental results with perturbative QCD and Monte Carlo predictions to test theoretical models.

Contribution

First measurement of prompt-photon cross sections in DIS at HERA, providing data to test QCD predictions and improve theoretical understanding.

Findings

Measured differential cross sections for prompt photons as functions of Q^2, x, E_T, and eta.

Perturbative QCD predictions show good agreement with the data.

Monte Carlo models are also compared to the measurements.

Abstract

Prompt-photon cross sections in deep inelastic ep scattering were measured with the ZEUS detector at HERA using an integrated luminosity of 320pb^-1. Measurements of differential cross sections are presented for inclusive prompt-photon production as a function of Q^2, x, E_T and eta. Perturbative QCD predictions and Monte Carlo predictions are compared to the measurements.