SMuK 2023 – scientific programme

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T: Fachverband Teilchenphysik

T 25: Flavor II

T 25.3: Talk

Tuesday, March 21, 2023, 17:30–17:45, HSZ/0304

Belle II measurement of B⁺ → K⁺π⁰ and B⁺ → π⁺π⁰ decays — •Justin Skorupa, Thibaud Humair, Hans-Günther Moser, Markus Reif, Oskar Tittel, and Benedikt Wach — Max Planck Institute for Physics, Munich, Germany

Charmless hadronic B-meson decays provide sensitive probes for physics beyond the Standard Model, since the contribution of penguin decay amplitudes to their decay is non-negligible. Exploiting isospin symmetry between charmless hadronic B-meson decays allows the construction of null tests of the Standard Model with an accuracy of better than 1%. Moreover, they allow to determine the angle α of the unitary triangle associated with B-meson decays. The Belle II experiment at the SuperKEKB e+ e- accelerator in Tsukuba, Japan, has the unique capability to measure all relevant final states to determine the angle α and to study all isospin-related decays necessary to set stringent limits on null tests. In this talk, a measurement of the decays B⁺ → K⁺π⁰ and B⁺ → π⁺π⁰ using Belle II data is presented.