Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1994-09-20
Physics
High Energy Physics
High Energy Physics - Theory
13 pages, uuencoded PostScript (with figures already embedded) [Talk presented at MRST '94: "What Next? Exploring the Future o
Scientific paper
We provide a non-technical introduction to "misaligned supersymmetry", a generic phenomenon in string theory which describes how the arrangement of bosonic and fermionic states at all string energy levels conspires to preserve finite string amplitudes even in the absence of spacetime supersymmetry. Misaligned supersymmetry thus naturally constrains the degree to which spacetime supersymmetry can be broken in string theory while preserving the finiteness of string amplitudes, and explains how the requirements of modular invariance and absence of physical tachyons affect the distribution of states throughout the string spectrum.
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