School of Physics Experimental Particle Physics

The Belle Experiment

Where our research takes place

The Belle experiment is centred around the data gathered by the multilayered particle detector called the Belle detector which began taking data in 1999. By observing the difference in the decays of particles in comparison to their antiparticles physicists can use the data gathered to make measurement of CP violation in different processes, and use these to expand our understanding of physics and the Universe as a whole. In fact, measurements made by the Belle detector regarding CP violation lead to the award of the 2008 Nobel Prize in Physics to Makoto Kobayashi and Toshihide Maskawa for "for the discovery of the origin of the broken symmetry which predicts the existence of at least three families of quarks in nature".

However, the precision of the Belle detector also allows for many other scientific searches, such as those for rare decays, exotic particles, dark matter and even the Higgs Boson, as well as the precision measurements of the properties relating to B mesons, D mesons and tauons. The Belle experiment is responsible for the first observation of CP violation outside of the kaon system as well as the discovery of the X(3872), a particle made up of 4 quarks. The Belle experiment has, to date, published more than 300 papers in a variety of physics journals.

The Belle experiment, after taking data for over a decade, will finish taking data in mid-2010. This is in order to make room for its successor, the Belle II detector.

See also:

The Belle homepage

top of page