000004214 001__ 4214
000004214 005__ 20240404124835.0
000004214 037__ $$aBELLE2-TALK-CONF-2024-045
000004214 041__ $$aeng
000004214 088__ $$aBELLE2-TALK-DRAFT-2024-039
000004214 100__ $$aShu-Ping Lin
000004214 245__ $$aSemileptonic decays at Belle and Belle II (incl. LUV measurements)
000004214 260__ $$aMoriond EW 2024 - Electroweak Interactions & Unified Theories$$c2024-03-24
000004214 300__ $$amult. p
000004214 520__ $$aAnalyses of meson decays to charmless hadronic final states are an important aspect of the Belle II program. They are sensitive to effects from non-standard model physics and provide experimentally precise constraints on the weak interactions of quarks. We present recent Belle II results on branching fractions and direct -violating asymmetries of the decays B0->K+pi-, B+->K+pi0, B+->K0pi+, and B0->K0pi0, and use these to test the standard model through an isospin-based sum rule. In addition, we measure the branching fraction and direct asymmetry of the decay B+->pi+pi0 and the branching fraction of the decay B0->pi+pi-. The data are collected with the Belle II detector from the SuperKEKB asymmetric- energy e+e- collider, consisting of 387 million Upsilon(4S)->BBbar events. We obtain -0.03+/-0.13+/-0.04 for the sum rule, in agreement with the standard model expectation of zero and with a precision comparable to the best existing determinations.
000004214 8560_ $$fdjaffe@bnl.gov
000004214 8564_ $$uhttps://docs.belle2.org/record/4214/files/BELLE2-TALK-CONF-2024-045.pdf