# Highly Granular Calorimeters: Technologies and Results

## TL;DR

This paper reviews advancements in highly granular calorimeters, focusing on technologies, experimental results, and R&D efforts for future collider applications and detector upgrades, emphasizing improved simulation and reconstruction methods.

## Contribution

It presents new technological prototypes and detailed studies of hadronic showers, enhancing calorimeter simulation models and reconstruction techniques for future collider experiments.

## Key findings

- Detailed understanding of hadronic shower structures
- Improved simulation models for calorimeter response
- Development of scalable detector prototypes

## Abstract

The CALICE collaboration is developing highly granular calorimeters for experiments at a future lepton collider primarily to establish technologies for particle flow event reconstruction. These technologies also find applications elsewhere, such as detector upgrades for the LHC. Meanwhile, the large data sets collected in an extensive series of beam tests have enabled detailed studies of the properties of hadronic showers in calorimeter systems, resulting in improved simulation models and development of sophisticated reconstruction techniques. In this proceeding, highlights are included from studies of the structure of hadronic showers and results on reconstruction techniques for imaging calorimetry. In addition, current R&D activities within CALICE are summarized, focusing on technological prototypes that address challenges from full detector system integration and production techniques amenable to mass production for electromagnetic and hadronic calorimeters based on silicon, scintillator, and gas techniques.