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HEPHY THEORIE GROUP |
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The way to the Theory of Everything? In modern physics symmetries play a central rôle – like in arts – because the principles of nature are manifested by them. The most general symmetry of the laws of nature is called SUPERSYMMETRY – or briefly named SUSY. It is a symmetry between matter particles (fermions) and force particles (bosons) and it offers the possibility of imbedding our today´s knowledge about the basic structure of matter (the so-called Standard Model) into a larger, more general theory. SUSY – the true love of physicists? In the supersymmetric theory fermions and bosons appear pairwise. If nature is really supersymmetric there must exist a supersymmetric partner to every presently known elementary particle.
SUSY particles can exhibit spectacular signatures from cascade decays. Left: the schematic figure for the production and the additional decay of SUSY particles at the LHC. Right: the simulation of the corresponding signature in the CMS detector.
Symmetry principles tell us, that specific transformations do not change the form of the natural laws. This can be seen in a simple analogy: After mirroring and color change Monroe remains still Monroe.
SUSY particle spectrum - Green: known particles of the Standard Model. Red: new particles searched for. The search for these new supersymmetric particles is one of the main tasks of the large experiments at the Tevatron in the USA, at the LHC in CERN and at the planned e+e- Linear Collider.
Webmaster Theory Group SUSY: Helmut Eberl und Brigitte De Monte, 2007 |
