The Belle II Experiment at KEK has started taking physics data of electron-positron collisions at a center-of-mass energy of 10.58 GeV on February 20, 2024. The goal for this year is to exceed the size of the dataset (integrated luminosity) recorded by the original Belle experiment while increasing the world's highest instantaneous luminosity.
The operation (Run 2) started after more than a year and a half of upgrading both the SuperKEKB accelerator and the Belle II detector. Our group has made significant contributions to the maintenance and upgrade of the TOP counter and the beam loss monitor system as members of the Belle II collaboration.
The instantaneous luminosity will be increased while tuning the SuperKEKB accelerator, with the ultimate goal of increasing the data size to more than 100 times the current level. Our group will continue to play a leading role in the operation to realize this goal. Please look forward to future analysis results at the world’s highest integrated luminosity!
The photo below captures the scene at the time of the first collision, showing the control room at KEK Tsukuba Lab filled with Belle II collaborators. See the official article for more details.
Ryotaro Komori (1st year master's student)
Akane Maeda (2nd year Ph.D. student)
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| N-lab students underground dealing with replacement works for the TOP counter | |
The control room at KEK Tsukuba Lab after the first beam collision was recorded
