1998/11/10 by Kwan-Leung Chan
Physics and Astronomy · #hep-th
published as Math-Physics-Astronomy library U. of Pennsylvania QC001-1997-C454 · Dissertation (1997)
arxiv created 1998/11/10 · arxiv updated 2009/11/30
Massless BPS-saturated states in toroidally compactified heterotic string were discussed first. Then, I constructed a large class of BPS-saturated states of toroidally compactified type II string theories. They were parametrized by four independent parameters. Both orthogonal and non-orthogonal intersections of non-perturbative states in the corresponding ten dimensional theories were discussed. Phenomenologically, I considered the string effect in the form of threshold corrections on dilatonic charged black holes, and the superpotential of N=1 supergravity theory