Karlsruhe 2024 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 24: Invited Overview Talks 2

T 24.2: Hauptvortrag

Dienstag, 5. März 2024, 09:30–10:00, Geb. 30.95: Audimax

Belle II at the start of Run2 and physics highlights — •Carsten Niebuhr — Deutsches Elektronen-Synchrotron DESY

In Run 1, which lasted from 2019-2022, Belle II at the SuperKEKB electron-positron collider in Japan collected data corresponding to an integrated luminosity of almost 430/fb, about half the data set accumulated by its predecessor experiment, Belle. While the analysis of this data is still continuing, it has already led to a number of world-leading results. In parallel, the accelerator and the experiment have undergone a number of improvements during the first 1.5 year long shutdown (LS1), including the installation of the complete 2-layer pixel vertex detector and several modifications on the accelerator side. These latter measures are designed to overcome some of the performance limitations experienced in the early years of operation of this novel and challenging machine. An outlook on Run 2, which has just started, will be given.

Keywords: Belle II; SuperKEKB; electron-positron collider; Flavourphysics