Francis Pham

17 May 2021
MESON 2021

Abstract: Charmless 𝐵 decays provide a unique portion of the Belle II program. The expected large signal yields with moderate backgrounds associated with efficient reconstruction of neutral particles enable world-leading determination of the CKM phase 𝛼/𝜙2, a conclusive understanding of the so-called K-𝜋 CP puzzle, and further insight into the nature of localized CP violation in three-body decays. We report preliminary measurements based on the sample collected during 2019-2020 operations and corresponding to 65 fb−1 of integrated luminosity. Results include a test of the 𝐾𝜋 isospin sum-rule, an angular analysis of 𝐵→𝜌+𝜌0 decays, and the reconstruction of a 𝐵0→𝜋0𝜋0 signal.