On factorization and vector bundles of conformal blocks from vertex algebras
arXiv:1909.04683
Abstract
Representations of vertex operator algebras define sheaves of coinvariants and conformal blocks on moduli of stable pointed curves. Assuming certain finiteness and semisimplicity conditions, we prove that such sheaves satisfy the factorization conjecture and consequently are vector bundles. Factorization is essential to a recursive formulation of invariants, like ranks and Chern classes, and to produce new constructions of rational conformal field theories and cohomological field theories.
55 pages. Final version, to appear in the Annales scientifiques de l'École normale supérieure