Study of photon energy bias using π0 → γγ decays from D∗+ −→ D0(→ K−π+π0)π+ at Belle II

Sumitted to PubDB: 2023-07-24

Category: Proceeding, Visibility: Public

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Authors	Chanchal Sharma
Date	July 12, 2023
Belle II Number	BELLE2-CONF-PROC-2023-025
Abstract	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 π0 → γγ decay from the D∗+ → D0(→ K−π+π0)π+ decay chain in both simulation and data collected by Belle II experiment. A detailed comparison study of mean π0 mass and π0 mass resolution is carried out in data and simulation in different bins of photon energy.