Letters in Mathematical Physics

, Volume 109, Issue 7, pp 1573–1610 | Cite as

Classification of screening systems for lattice vertex operator algebras

  • Katrina BarronEmail author
  • Nathan Vander Werf


We study and classify systems of certain screening operators arising in a generalized vertex operator algebra, or more generally an abelian intertwining algebra with an associated vertex operator (super)algebra. Screening pairs arising from weight one primary vectors acting commutatively on a lattice vertex operator algebra (the vacuum module) are classified into four general types; one type of which has been shown to play an important role in the construction and study of certain important families of \({\mathcal {W}}\)-vertex algebras. These types of screening pairs which we go on to study in detail through the notion of a system of screeners are lattice elements or “screening momenta” which give rise to screening pairs. We classify screening systems for all positive definite integral lattices of rank two, and for all positive definite even lattices of arbitrary rank when these lattices are generated by a screening system.


Vertex operator algebras Conformal field theory Screening operators 

Mathematics Subject Classification

Primary 17B69 Secondary 81T40 17B68 17B22 



This paper consists, essentially, of the first three chapters of the second author’s Ph.D. Thesis [56] under the supervision of the first author. The authors would like to thank Antun Milas, Drazan Adamovic, and Jinwei Yang for useful comments and guidance in the writing of the thesis from which this paper is derived. The authors thank the referee for pointing out significant points of clarification in the expository parts of the paper as well as some mathematical improvements. The first author is the recipient of Simons Foundation Collaboration Grant 282095, and greatly appreciates their support.


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Authors and Affiliations

  1. 1.Department of MathematicsUniversity of Notre DameNotre DameUSA
  2. 2.Department of MathematicsUniversity of Nebraska at KearneyKearneyUSA

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