Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1996-01-05
Nucl.Phys. B469 (1996) 37-50
Physics
High Energy Physics
High Energy Physics - Theory
18 pages, harvmac, misprints, minor correction
Scientific paper
10.1016/0550-3213(96)00108-3
We study a class of extremal transitions between topological distinct Calabi--Yau manifolds which have an interpretation in terms of the special massless states of a type II string compactification. In those cases where a dual heterotic description exists the exceptional massless states are due to genuine strong (string-) coupling effects. A new feature is the appearance of enhanced non-abelian gauge symmetries in the exact nonperturbative theory.
Klemm Albrecht
Mayr Peter
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