Particle Showers in a Highly Granular Hadron Calorimeter

TL;DR

This paper presents results from a highly granular hadron calorimeter prototype tested in beam experiments, providing detailed data on hadronic showers to improve model accuracy and detector performance.

Contribution

It introduces a large-scale, highly granular calorimeter prototype with 7608 channels, enabling detailed shower measurements and model validation in high energy physics.

Findings

Detailed longitudinal and lateral shower profiles obtained.

First application of software compensation for energy resolution.

Comparison of shower data with multiple hadronic models.

Abstract

The CALICE collaboration has constructed highly granular electromagnetic and hadronic calorimeter prototypes to evaluate technologies for the use in detector systems at a future Linear Collider. The hadron calorimeter uses small scintillator cells individually read out with silicon photomultipliers. The system with 7608 channels has been successfully operated in beam tests at DESY, CERN and Fermilab since 2006, and represents the first large scale tests of these devices in high energy physics experiments. The unprecedented granularity of the detector provides detailed information of the properties of hadronic showers, which helps to constrain hadronic shower models through comparisons with model calculations. Results on longitudinal and lateral shower profiles, compared to a variety of hadronic shower models, first results with a software compensation technique for the energy resolution and an outlook on the next generation detector prototype are presented.