Ghost systems: A vertex algebra point of view

W. Eholzer, L. Fehér, A. Honecker

Research output: Contribution to journalArticle

24 Citations (Scopus)


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 underlie 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 ℤN-invariant subalgebras of the fermionic ghost system.

Original languageEnglish
Pages (from-to)669-688
Number of pages20
JournalNuclear Physics B
Issue number3
Publication statusPublished - May 11 1998


  • Conformal field theory
  • Invariant subalgebras
  • Twisted representations
  • W algebras

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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