Description
Zoom Link, ID: 91011235165, Code: 983836
Future electron-positron collider experiments impose stringent requirements on calorimeter systems, including high granularity (compatible with the particle flow approach), excellent energy resolution, low cost, and large-scale constructability. While existing calorimeter concepts each possess distinct merits, none can simultaneously satisfy all of the above criteria. Scintillating glass, as a...
Scintillating glass is a promising active material for the AGORA high-granularity calorimeter concept for future electron–positron colliders, owing to its high density, potentially high light yield, relatively low cost, and feasibility for large-scale fabrication. As part of the detector R&D program, we perform systematic laboratory characterization of scintillating-glass samples using...
Hadron calorimeters are central to jet energy measurement, particle identification, and overall physics sensitivity at modern collider experiments, including CEPC and FCC. Over the past two decades, substantial progress has been made in both high-granularity and dual-readout calorimetry. Building on these advances, AI/ML techniques combined with precision timing information offer significant...
Precision measurements of the Higgs, W/Z bosons at future $e^{+}e^{-}$ colliders pose a stringent requirement on the calorimetry system for unprecedented jet performance. At the Circular Electron Positron Collider (CEPC), one of the Higgs factory options, a new electromagnetic calorimeter has been developed using finely segmented scintillating crystals. The calorimeter is compatible with the...
The Stereo ECal consists of elongated scintillator strips arranged at alternating stereo angles in adjacent layers. This configuration provides three-dimensional spatial information while limiting the number of readout channels, making it a candidate design for a highly granular calorimeter at the CEPC. In this study, the spatial and angular reconstruction performance of a six-layer Stereo...
A proposal for the CEPC ECAL is a highly granular scintillating crystal design that uses SiPMs to measure physics signals from photons. The potential to develop particle identification methods using deep and traditional machine learning is explored. A contrastive learning technique was demonstrated to enable the separation of showering and ‘punch-through’ pions without explicit labels. A...
Highly compact and granular electromagnetic calorimeters are required for precision luminosity measurements at future e⁺e⁻ colliders and for the determination of positron multiplicity and energy spectra in the LUXE experiment.
A silicon–tungsten sampling calorimeter is being developed within the FCAL and DRD Calo collaborations. Its construction poses a significant technological challenge,...
High-granularity electromagnetic calorimeters employing long scintillator bars have attracted increasing interest for future collider experiments. Compared with conventional BGO crystals, BSO provides a promising alternative due to its faster scintillation decay time and cost advantage, making it a potential candidate for future ECAL applications.
In this work, we present a systematic...
Bismuth silicate (Bi4Si3O12, BSO) crystal is a promising inorganic scintillator for the electromagnetic calorimeters of future high-energy physics experiments. It offers stopping power and density comparable to those of bismuth germanate (Bi4Ge3O12, BGO), together with a faster decay time, greater radiation hardness, and lower raw-material cost. Large, high-quality BSO crystals are...
Longitudinal and lateral electromagnetic shower shapes for a highly granular crystal electromagnetic calorimeter were studied by fitting published shower profile models using experimental data from a 2025 testbeam experiment performed at the Proton Synchrotron (PS) at CERN, on an event-by-event basis. Values for the radiation length, critical energy, and Molière radius were extracted from the...
The Dual-Readout Calorimeter (DRC) is a promising candidate calorimetry technique for future e+e- colliders such as FCC-ee and CEPC. By simultaneously measuring scintillation and Cherenkov signals, this technique enables direct, event-by-event measurement and correction of fluctuations in the electromagnetic shower fraction. As a result, it can significantly improve the hadronic energy...
