Ceren Ay

05 March 2024
DPG-Frühjahrstagungen, Karlsruhe, 2024

Abstract: The measurement of branching ratios and CP asymmetries of 𝐵 meson decays 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 𝐵 0 𝐵¯0The measurement of branching ratios and CP asymmetries of 𝐵 meson decays 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 𝐵 0 −→ 𝐾 + 𝜋 − 𝜋 0 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. Recent results from these studies will be presented. −→ 𝐾 + 𝜋 − 𝜋 0 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. Recent results from these studies will be presented.