Measurement of the branching fraction of the B⁰ → K_S⁰ π⁰ γ decay using 190 fb^-1 of Belle II data

2022/06/16 by Belle II Collaboration, F. Abudinén, I. Adachi +687
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2206.08280

openalex publication_date 2022/06/16 · openalex created_date 2022/06/19 · openalex updated_date 2026/07/28

Abstract

We report the measurement of the branching fraction of the B⁰ → K_S⁰ π⁰ γ decay in e⁺ e^- → Υ(4S) → B B data recorded by the Belle II experiment at the SuperKEKB asymmetric-energy collider and corresponding to 190 fb^-1 of integrated luminosity. The signal yield is measured to be 121± 29 \hbox(stat.), leading to the branching fraction \cal B(B⁰ → K_S⁰ π⁰ γ) = (7.3 ± 1.8 \hbox(stat.) ± 1.0 \hbox(syst.) )× 10^-6, which agrees with the known value.

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