Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2001-09-20
JHEP 0111:013,2001
Physics
High Energy Physics
High Energy Physics - Theory
14 pp, LaTex2e
Scientific paper
10.1088/1126-6708/2001/11/013
We analyze D-brane states and their central charges on the resolution of C^2/Z_n by using local mirror symmetry. There is a point in the moduli space where all n(n-1)/2 branches of the principal component of the discriminant locus coincide. We argue that this is the point where compactifications of Type IIA theory on a K3 manifold containing such a local geometry acquire a non-perturbative gauge symmetry of the type A_{n-1}. This analysis, which involves an explicit solution of the GKZ system of the local geometry, explains how the quantum geometry exhibits all positive roots of A_{n-1} and not just the simple roots that manifest themselves as the exceptional curves of the classical geometry. We also make some remarks related to McKay correspondence.
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