Heterotic String Conformal Field Theory And A-D-E Singularities
arXiv:hep-th/9909229 · doi:10.1088/1126-6708/2000/02/025
Abstract
We analyze the behavior of the heterotic string near an A-D-E singularity without small instantons. This problem is governed by a strongly coupled worldsheet conformal field theory, which, by a combination of O(alpha') corrections and worldsheet instantons, smooths out the singularities present in the classical geometry.
23 pp, additional references and citation of previous work and a nontrivial correction concerning (0,4) linear sigma models
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