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Supersymmetry allows fermions to morph to bosons and vice versa. String theory demands it. So far no evidence for it. It should be there because supersymmetry is the Dirac square root of the universal Poincare symmetry group of Einstein's 1905 Special Theory of Relativity whose local gauge theory extension is Einstein's 1916 General Theory of Relativity of the gravitational field.

Searches for supersymmetry at high-energy colliders
Jonathan L. Feng, Jean-Fran├žois Grivaz, and Jane Nachtman
Particle physics is at a crossroads. In the past three decades the standard model (SM) has been successful in describing all known elementary particles and their interactions. Ahead of us is the CERN Large Hadron Collider offering great possibilities to search for and study new phenomena, in the mass range from 100 GeV to several TeV. This article reviews the current state of experimental searches for supersymmetry, the most widely studied extension of the SM. Beyond the Higgs boson that has yet to be discovered, there are strong motivations for supersymmetry, including the need to explain dark matter and the desire for unification of all fundamental forces.
Published 11 March 2010
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