Study of Photon Energy Bias Using \(\pi ^0\rightarrow \gamma \gamma \) Decays from  \(D^{*+}\rightarrow D^{0}(\rightarrow K^{-}\pi ^{+}\pi ^{0})\pi ^{+}\) at Belle II

Photon energy bias is used to compute the corrections to the reconstructed photon energy and improve data-simulation agreement in analyses having final states with photons. In this study, we reconstruct clean samples of \(\pi ^0\rightarrow \gamma \gamma \) decay from the \(D^{*+}\rightarrow D^{0}(\rightarrow K^{-}\pi ^{+}\pi ^{0})\pi ^{+}\) decay chain in both simulation and data collected by Belle II experiment. The Belle II is the upgraded experimental facility at SuperKEKB, KEK, Japan. We present the comparison of mean \(\pi ^0\) mass and \(\pi ^0\) mass resolution in data recorded at 207 fb \(^{-1}\) as well as in simulation in different bins of photon energy.