Preliminary optimization study on the PFA-based GSHCAL for the CEPC

Precision measurements of properties of the Higgs, W and Z bosons are the key scientific goals at future e + e - Higgs factories. A main challenge for these goals is to fulfill an unprecedented jet energy resolution, and the design of the hadronic calorimeter (HCAL) is found to be one of the most important factors. The conceptual design of high-granularity glass scintillator hadronic calorimeter (GSHCAL) has been proposed recently, which can achieve a Boson Mass Resolution (BMR) of around 3.38% with an initial parameter configuration and show great potential to significantly increase the sensitivities to the most physics measurements at future e^+e^- colliders. Nevertheless, more studies on the design optimization of the GSHCAL are necessary to balance the key physics performance (i.e. the BMR) and the cost, as well as the engineering complexity. In this paper, the optimizations for several key parameters of the GSHCAL are discussed and different GSHCAL configurations are compared, which provide an important reference for the GSHCAL design. Besides, the R&D progress of high-performance and large-area glass scintillators is also introduced.