Influence of beam related background on ILD reconstruction

TL;DR

This paper examines how beam-related backgrounds, primarily electron-positron pairs from beamstrahlung, affect ILD detector reconstruction at the ILC, including simulation methods and impact analysis under different beam conditions.

Contribution

It introduces methods for generating and simulating pair-backgrounds and assesses their influence on ILD reconstruction under various beam parameters.

Findings

Background significantly affects detector performance.

Simulation methods effectively model pair-background effects.

Physics analyses can incorporate overlayed backgrounds for realistic results.

Abstract

At the ILC machine induced backgrounds, mainly electron-positron pairs from beamstrahlung, will be the most important source of unwanted interactions. Methods of generating, simulating and imposing pair-background on physics events are presented and influence of this background on ILD reconstruction is reviewed. Effects of the background on various ILD detectors are shown for nominal beam parameters and for SB09 reduced beam parameter set and an example of a physics analysis performed with overlayed pair background is given.