Phenomenology of Strongly Coupled Heterotic String Theory

Details Phenomenology of Strongly Coupled Heterotic String Theory Phenomenology of Strongly Coupled Heterotic String Theory

1996-09-05

arxiv.org/abs/hep-th/9609046v1

Physics

High Energy Physics

High Energy Physics - Theory

Uses harvmac. Talk which recapitulates hep-th/9605136

Scientific paper

This is the text of a talk given at the Inaugural Conference of the Asia Pacific Center for Theoretical Physics, Seoul, Korea, June 9, 1996. If nature is described by string theory, and if the compactification radius is large (as suggested by the unification of couplings), then the theory is in a regime best described by the low energy limit of $M$-theory. We discuss some phenomenological aspects of this view. The scale at which conventional quantum field theory breaks down is of order the unification scale and consequently (approximate) discrete symmetries are essential to prevent proton decay. There are one or more light axions, one of which solves the strong CP problem. Modular cosmology is still problematic but much more complex than in perturbative string vacua.

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