Speaker
Description
The design and optimization of the Electromagnetic Calorimeter(ECAL) are crucial for the Circular Electron Positron Collider (CEPC) project, a proposed Higgs/Z factory with the total circumference of 100km. Following the reference design of the International Large Detector, a set of silicon-tungsten and scintillator-tungsten sampling ECAL geometries have been implemented into the Geant4 simulation, and a dedicated Particle Flow reconstruction, Arbor, has been adjusted to these geometries. Using full simulated-reconstructed samples, the performances of photon reconstructions, nearby electromagnetic(EM) showers separation and the reconstructions of physics events such as Higgs->γγ and Z->ττ have been quantified and compared at different ECAL geometries. Based on these analysis results, we checked and optimized the ECAL structure design for the CEPC project. Compared to the original design, the optimized geometry could reduce the number of read-out channels and maintains the same level performances on physics events reconstruction.
