New perspectives on segmented crystal calorimeters for future colliders

Abstract

Crystal calorimeters have a long history of pushing the frontier on high-resolution electromagnetic (EM) calorimetry. We explore in this paper major innovations in collider detector performance that can be achieved with crystal calorimetry when longitudinal segmentation and dual-readout capabilities are combined with a new high EM resolution approach to PFA in multi-jet events, such as $e^{+}{e}^{+}\to HZ$ events in all-hadronic final-states at Higgs factories. We demonstrate a new technique for pre-processing ${\pi }^0$ momenta through combinatoric di-photon pairing in advance of applying jet algorithms. This procedure significantly reduces ${\pi }^0$ photon splitting across jets in multi-jet events. The correct photon-to-jet assignment efficiency improves by a factor of 3 with a $3\%/\sqrt{E}$ EM resolution. In addition, the technique of bremsstrahlung photon recovery significantly improves electron momentum measurements. A high EM resolution calorimeter increases the Z boson recoil mass resolution in Higgstrahlung events for decays into electron pairs to 80% of that for muon pairs. We present the design and optimization of a highly segmented crystal detector concept that achieves the required energy resolution, and a time resolution better than 30 ps providing exceptional particle identification capabilities. We demonstrate that, contrary to previous detector designs that suffered from large neutral hadron resolution degradation from one interaction length of crystals in front of a sampling hadron calorimeter, the implementation of dual-readout on crystals permits to achieve a resolution better than $30\%/\sqrt{E}\oplus 2\%$ for neutral hadrons. Our studies find that the integration of crystal calorimetry into future Higgs factory collider detectors can open new perspectives by yielding the highest level of combined EM and neutral hadron resolution in the PFA paradigm.

References in corpus (10)

• Particle Flow Calorimetry and the PandoraPFA Algorithm
• CEPC Conceptual Design Report: Volume 2 - Physics & Detector
• VUV-sensitive Silicon Photomultipliers for Xenon Scintillation Light Detection in nEXO
• HepSim: a repository with predictions for high-energy physics experiments
• Response of microchannel plates to single particles and to electromagnetic showers
• CsI(Tl) Pulse Shape Discrimination with the Belle II Electromagnetic Calorimeter as a Novel Method to Improve Particle Identification at Electron-Positron Colliders
• Barrel time-of-flight detector for the PANDA experiment at FAIR
• Fiber and Crystals Dual Readout calorimeters
• Deep Diffused Avalanche Photodiodes for Charged Particles Timing
• Improving the Prompt Electromagnetic Energy Component of Jet Energy Resolution with pi0 Fitting in High Granularity Electromagnetic Calorimeters

Cited by in corpus (10)

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• Flavor Physics at the CEPC: a General Perspective
• Quantum Nanophotonics with Energetic Particles:X-rays and Free Electrons
• FCC feasibility studies: Impact of tracker- and calorimeter-detector performance on jet flavor identification and Higgs physics analyses
• Jas4pp -- a Data-Analysis Framework for Physics and Detector Studies
• The \texttau{} challenge at FCC-ee
• Characterization of thin optical filters for high purity Cherenkov light readout from scintillating crystals
• Geant4 simulations of sampling and homogeneous hadronic calorimeters with dual readout for future colliders
• Particle Flow with a Hybrid Segmented Crystal and Fiber Dual-Readout Calorimeter