Dortmund 2021 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 77: QCD II

T 77.4: Vortrag

Donnerstag, 18. März 2021, 16:45–17:00, Tb

First Belle II results on charmless B-decays and prospects — •Oskar Tittel, Markus Reif, Benedikt Wach, and Hans-Günther Moser for the Belle II collaboration — Max-Planck-Institut für Physik, München, Deutschland

In early 2019 the Belle II experiment at the SuperKEKB electron-positron collider started taking data on the Υ(4S) resonance. The expected large yields of charmless B decays at Belle II will enable significant advancements in the understanding of quark dynamics, including a world-leading determination of the CKM phase α/ φ₂, and a conclusive understanding of the so-called K-π CP-puzzle. Using an early sample of 34.6 fb⁻¹ recorded until mid-2020, we report on first measurements of branching ratio and direct CP violation of charmless B decays. The new results are compatible with the current state of knowledge and the ongoing data taking looks promising to deliver the most precise measurements on this field.