CompAZ: parametrization of the luminosity spectra for the photon collider

TL;DR

This paper introduces a simple analytical model for realistic photon-energy spectra at TESLA's Photon Collider, enabling efficient simulations and calculations of gamma-gamma interactions.

Contribution

It presents a novel parametrization based on Compton scattering formulas, fitted to detailed simulations including nonlinear effects and higher order processes.

Findings

Accurately reproduces photon energy distribution and polarization at high energies.

Provides a practical tool for Monte Carlo simulations and cross-section calculations.

Validated against full beam simulations with nonlinear corrections.

Abstract

A simple model, based on the analytical formula for the Compton scattering, is proposed to describe the realistic photon-energy spectra for the Photon Collider at TESLA. Parameters of the model are obtained from the full simulation of the beam by V.Telnov, which includes nonlinear corrections and contributions of higher order processes. Photon energy distribution and polarization, in the high energy part of the spectra, are well reproduced. Our model can be used for a Monte Carlo simulation of gamma-gamma events at various energies and for direct cross-section calculations.