A simulation study of the e+e− to gamma Z process for design optimization of the international large detector

The primary target of ILC 250 is to precisely measure the coupling constants between the Higgs boson and other Standard Model particles. For this, we need to precisely calibrate the energy scales for various particles. In this paper, the necessary calibration methods using the e+e− → γZ process will be discussed. We will focus on the photon energy reconstruction methods and report the calibration precision.