Emerging internal symmetries from effective spacetimes

  title={Emerging internal symmetries from effective spacetimes},
  author={Manfred Lindner and Sebastian Ohmer},
Abstract Can global internal and spacetime symmetries be connected without supersymmetry? To answer this question, we investigate Minkowski spacetimes with d space-like extra dimensions and point out under which general conditions external symmetries induce internal symmetries in the effective 4-dimensional theories. We further discuss in this context how internal degrees of freedom and spacetime symmetries can mix without supersymmetry in agreement with the Coleman–Mandula theorem. We present… CONTINUE READING