Belle-Experiment

The Belle experiment is located in the Japanese Research Center for Particle Physics KEK and deals with B- physics, specifically with the CP violation of B mesons.

A similar experiment, which the BaBar experiment is running, in the United States.

One of the Physics Nobel Prize 2008 was given to Makoto Kobayashi, mentioned the former director of the INPS Department ( Institute of Particle and Nuclear Studies ) of the KEK explicitly in the rationale for the award ceremony, the Belle experiment, the instrumental to confirm the theoretical predictions contributed by Kobayashi and others.

Belle II

Supported by the Nobel prize for Kobayashi, the Japanese government decided in late 2009 for the time being, enhance the Belle experiment and the KEKB accelerator. The new schedule saw a start-up in 2014, now before the end of 2016. For the purpose of enhancement of the detector and the analysis of the data, a new collaboration was established, bearing the name of Belle II. Among others, the KIT, the HEPHY, the Max - Planck - Institute for Physics and the Justus -Liebig- University Giessen joined the collaboration.

While the scaffolding, parts of the calorimeter and the magnet of the Belle detector can be reused, the largest part of the detector is completely redesigned. This reflects the fact that a significantly greater amount of ground particles will end up with the physically interesting events in the detector due to the higher luminosity.