The CREX Acceptance Function

The CREX experiment measures the parity violating asymmetry of longitudinally polarized electrons scattered from the unpolarized Ca48 nucleus. While measuring one average asymmetry value over a limited spectrometer acceptance, it is the acceptance function that connects what we measured and what theoretical models predict. This means that using the acceptance function for the experiment is crucial to enable proper benchmarking of theoretical models. The acceptance function is constrained by all optical components between the target and the detectors. With a carefully calibrated simulation, a Monte Carlo technique is used to derive the acceptance function. In this talk, I will show how to get the acceptance function in detail and the final result we get for CREX.