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arxiv: 1002.0028 · v2 · pith:DNXB6WTPnew · submitted 2010-02-01 · ✦ hep-th · math.AT· math.DG

Vanishing Chiral Algebras and H\"ohn-Stolz Conjecture

classification ✦ hep-th math.ATmath.DG
keywords chiralalgebraconjectureohn-stolzaccountahleralgebrascases
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Given a two-dimensional quantum field theory with (0,2) supersymmetry, one can construct a chiral (or vertex) algebra. The chiral algebra of a (0,2) supersymmetric sigma model is, perturbatively, the cohomology of a sheaf of chiral differential operators on a string K\"ahler manifold. However, it vanishes in some cases when instantons are taken into account. I will discuss the implication of this phenomenon for the H\"ohn-Stolz conjecture on the Witten genus.

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