Measurements of B->Kpi and B->pipi branching fractions and CP asymmetries at Belle II

Sumitted to PubDB: 2024-06-14

Category: Talk, Visibility: Public

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Authors	Shu-Ping Lin
Date	March 24, 2024
Belle II Number	BELLE2-TALK-CONF-2024-045
Abstract	Analyses of meson decays to charmless hadronic final states are an important aspect of the Belle II program. They are sensitive to effects from non-standard model physics and provide experimentally precise constraints on the weak interactions of quarks. We present recent Belle II results on branching fractions and direct -violating asymmetries of the decays B0->K+pi-, B+->K+pi0, B+->K0pi+, and B0->K0pi0, and use these to test the standard model through an isospin-based sum rule. In addition, we measure the branching fraction and direct asymmetry of the decay B+->pi+pi0 and the branching fraction of the decay B0->pi+pi-. The data are collected with the Belle II detector from the SuperKEKB asymmetric- energy e+e- collider, consisting of 387 million Upsilon(4S)->BBbar events. We obtain -0.03+/-0.13+/-0.04 for the sum rule, in agreement with the standard model expectation of zero and with a precision comparable to the best existing determinations.
Conference	Moriond EW 2024 - Electroweak Interactions & Unified Theories