Ghost Systems: A Vertex Algebra Point of View

Details Ghost Systems: A Vertex Algebra Point of View Ghost Systems: A Vertex Algebra Point of View

1997-08-29

arxiv.org/abs/hep-th/9708160v1

Nucl.Phys. B518 (1998) 669-688

Physics

High Energy Physics

High Energy Physics - Theory

20 pages, plain TeX

Scientific paper

10.1016/S0550-3213(98)00061-3

Fermionic and bosonic ghost systems are defined each in terms of a single vertex algebra which admits a one-parameter family of conformal structures. The observation that these structures are related to each other provides a simple way to obtain character formulae for a general twisted module of a ghost system. The U(1) symmetry and its subgroups that underly the twisted modules also define an infinite set of invariant vertex subalgebras. Their structure is studied in detail from a W-algebra point of view with particular emphasis on Z_N-invariant subalgebras of the fermionic ghost system.

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