GARLIC: GAmma Reconstruction at a LInear Collider experiment

TL;DR

The paper introduces GARLIC, an algorithm designed to identify photons within hadronic showers in a highly granular silicon-tungsten calorimeter, enhancing jet energy measurement at future Linear Colliders.

Contribution

It presents a novel photon identification algorithm tailored for a silicon-tungsten calorimeter in the ILD detector concept, with performance evaluation based on detailed simulations.

Findings

High photon identification efficiency demonstrated

Effective separation of photons from hadronic background

Potential improvements in jet energy resolution

Abstract

The precise measurement of hadronic jet energy is crucial to maximise the physics reach of a future Linear Collider. An important ingredient required to achieve this is the efficient identification of photons within hadronic showers. One configuration of the ILD detector concept employs a highly granular silicon-tungsten sampling calorimeter to identify and measure photons, and the GARLIC algorithm described in this paper has been developed to identify photons in such a calorimeter. We describe the algorithm and characterise its performance using events fully simulated in a model of the ILD detector.