Particle Flow Calorimetry

TL;DR

Particle flow calorimetry aims to precisely measure hadron jet energies with high resolution across various collider experiments, leveraging high granularity to improve background removal and energy measurement accuracy.

Contribution

This paper discusses the design and advantages of particle flow calorimetry, emphasizing its potential for excellent energy resolution and background suppression in collider experiments.

Findings

Achieves sigma(E)/E < 5% for 50-250 GeV jets

Enhances background removal through high granularity

Applicable to both electron-positron and hadron colliders

Abstract

The motivation for PF calorimetry is to experimentally measure the energy of hadron jets with excellent resolution. In particle flow designs, sigma(E)/E < 5% should be possible for a range of jet energies from 50 GeV to 250 GeV, important particularly for experiments at electron-positron colliders (ILC, CLIC, FCCee, CEPC). The high granularity, which is essential for PF calorimetry, can also be very beneficial for removal of background from pile-up on an event-by-event basis making such calorimeters an attractive approach for hadron collider experiments, for example the HGCAL under construction for CMS at the CERN HL-LHC.