Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2002-02-18
Physics
High Energy Physics
High Energy Physics - Theory
Extended version of presentation at the SG@25 conference, SUNY@Stony Brook, Dec. 1-2, 2001, 35pp., 1 fig., LaTeX twice
Scientific paper
We discuss the problem of introducing background spacetimes of the de Sitter type (quintessential backgrounds) in the context of fundamental theories involving supersymmetry. The role of a model presented in 1984, showing that these backgrounds can occur as spontaneously broken phases of locally supersymmetric 4D, N-extended theories, is highlighted. The present twin challenges of the presumed presence of supersymmetry in particle physics and the emergence of experimental evidence for a positive cosmological constant from type-II supernovae data are noted for the continued investigation of superstring/M-theory. Finally we note how the 1984-model may have a role to play in future investigations.
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