On the resolution of dual readout calorimeters

TL;DR

This paper introduces a simple, verified formula for the energy resolution of dual readout calorimeters, aiding understanding of their performance and correction mechanisms for future collider applications.

Contribution

It presents a new, straightforward formula for dual readout calorimeter resolution, validated through simulations, enhancing comprehension of their capabilities and limitations.

Findings

Validated the formula with toy and full simulations

Demonstrated correction for energy escaping and clustering effects

Provided approximate resolution and energy scale formulae

Abstract

Dual readout calorimeters allow state-of-the-art resolutions for hadronic energy measurements. Their various incarnations are leading candidates for the calorimeter systems for future colliders. In this paper, we present a simple formula for the resolution of a dual readout calorimeter, which we verify with a toy simulation and with full simulation results. This formula can help those new to dual readout calorimetry understand its strengths and limitations. The paper also highlights that the dual readout correction works not just to compensate for binding energy loss, but also for energies escaping the calorimeter or clustering algorithm. Formulae are also presented for approximate resolutions and energy scales in terms of different sources of response.