Investigating the Decay Amplitude Models Based on Dalitz Plot Analysis for B0 → K+π−π0 Decays

Sumitted to PubDB: 2026-01-26

Category: Master Thesis

Principal Authors	Ceren Ay, Stefan Wallner, Thomas Kuhr
Date	2025-02-05
Belle II Number	BELLE2-MTHESIS-2026-004
Abstract	Amplitude calculations are essential tools for understanding the underlying physics. These measurements are particularly challenging for the decays of B mesons to multi-body hadronic final states, since elaborate amplitude analyses are required to separate and measure the contributions of the interfering resonances in these final states. We perform a Dalitz plot analysis of data recorded by the Belle II experiment to extract these parameters for B0 → K+π−π0 decays. As part of this, we investigate the model dependence by studying different parameterizations of amplitude models. We also check the dependence on the initial values of the fit and investigate fit biases.
Institute	MPP