Precision timing for collider-experiment-based calorimetry

TL;DR

This paper reviews precision timing techniques in calorimetry for collider experiments, exploring system options and technologies to improve particle identification, reconstruction, and pileup mitigation.

Contribution

It compares two system approaches—cell-level timing and dedicated timing layers—and discusses relevant technologies for high-precision calorimetry.

Findings

Cell-level timing can cover the full detector volume.

Dedicated timing layers enhance timing resolution.

Technologies vary for different calorimeter approaches.

Abstract

In this White Paper for the 2021 Snowmass process, we discuss aspects of precision timing within electromagnetic and hadronic calorimeter systems for high-energy physics collider experiments. Areas of applications include particle identification, event and object reconstruction, and pileup mitigation. Two different system options are considered, namely cell-level timing capabilities covering the full detector volume, and dedicated timing layers integrated in calorimeter systems. A selection of technologies for the different approaches is also discussed.