Revolutionizing Particle Physics: The Belle II Experiment Kicks Off Run 2 with Upgraded Detector and Larger Dataset

Belle II resumes operations at CERN

The Belle II detector at SuperKEKB in Japan recorded its first e+e- collisions on 20 February, marking the successful start of Run 2. During a scheduled long shutdown that began in summer 2022, several upgrades were made to the facility to better handle the expected increases in luminosity and backgrounds originating from the beams.

The Belle II experiment aims to uncover new phenomena through precise analysis of the properties of B mesons and other particles produced by the SuperKEKB accelerator. To achieve this goal, researchers have installed a new vertex detector with a fully implemented pixel detector and an improved beam pipe at the collision point. Additionally, enhancements were made to the radiation shielding around the detector and other measures were implemented to improve data-collection performance.

With these upgrades in place, Belle II is now poised to collect high-quality data that could lead to exciting discoveries in the field of particle physics. The long-term goal of Belle II is to accumulate a dataset that is 50 times larger than that of the former Belle experiment. This ambitious goal will allow researchers to delve deeper into the mysteries of particle physics and potentially discover new physics beyond the Standard Model.

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