We find all values of k∈C, for which the embedding of the maximal affine vertex algebra in a simple minimal W-algebra Wk(g,θ) is conformal, where g is a basic simple Lie superalgebra and -θ its minimal root. In particular, it turns out that if Wk(g,θ) does not collapse to its affine part, then the possible values of these k are either -23h∨ or -h∨-12, where h∨ is the dual Coxeter number of g for the normalization (θ,θ)=2. As an application of our results, we present a realization of simple affine vertex algebra V-n+12(sl(n+1)) inside the tensor product of the vertex algebra Wn-12(sl(2|n),θ) (also called the Bershadsky-Knizhnik algebra) with a lattice vertex algebra.

Conformal embeddings of affine vertex algebras in minimal W-algebras I: Structural results

Möseneder Frajria, Pierluigi;
2018

Abstract

We find all values of k∈C, for which the embedding of the maximal affine vertex algebra in a simple minimal W-algebra Wk(g,θ) is conformal, where g is a basic simple Lie superalgebra and -θ its minimal root. In particular, it turns out that if Wk(g,θ) does not collapse to its affine part, then the possible values of these k are either -23h∨ or -h∨-12, where h∨ is the dual Coxeter number of g for the normalization (θ,θ)=2. As an application of our results, we present a realization of simple affine vertex algebra V-n+12(sl(n+1)) inside the tensor product of the vertex algebra Wn-12(sl(2|n),θ) (also called the Bershadsky-Knizhnik algebra) with a lattice vertex algebra.
JOURNAL OF ALGEBRA
Collapsing level; Conformal embedding; Conformal level; Primary; Secondary; Vertex algebra; Virasoro (=conformal) vector; Algebra and Number Theory
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11311/1044158
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