String Theory, Supersymmetry, Unification, and All That

Details String Theory, Supersymmetry, Unification, and All That String Theory, Supersymmetry, Unification, and All That

1998-03-22

arxiv.org/abs/hep-th/9803179v2

Rev.Mod.Phys.71:S112-S120,1999

Physics

High Energy Physics

High Energy Physics - Theory

21 pages, 5 figures. To appear in the American Physical Society Centenary issue of Reviews of Modern Physics, March 1999

Scientific paper

10.1103/RevModPhys.71.S112

String theory and supersymmetry are theoretical ideas that go beyond the standard model of particle physics and show promise for unifying all forces. After a brief introduction to supersymmetry, we discuss the prospects for its experimental discovery in the near future. We then show how the magic of supersymmetry allows us to solve certain quantum field theories exactly, thus leading to new insights about field theory dynamics related to electric-magnetic duality. The discussion of superstring theory starts with its perturbation expansion, which exhibits new features including ``stringy geometry.'' We then turn to more recent non-perturbative developments. Using new dualities, all known superstring theories are unified, and their strong coupling behavior is clarified. A central ingredient is the existence of extended objects called branes.

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