Higher level Kac-Moody representations and rank reduction in string models

P. Forgács, Z. Horváth, L. Palla, P. Vecsernyés

Research output: Contribution to journalArticle

25 Citations (Scopus)


It is shown that an orbifold-like construction based on an external automorphism yields the E8 model when applied to several 10-dimensional heterotic strings. The decomposition of the internal space into direct products of level two Ě8 and critical Ising representations is given. All characters and string functions of level-two Ě8 representations are derived explicitly. The conformal field theory underlying the E8 string is determined in detail. We also elucidate the role of modular invariance in the apparent uniqueness of the E8 string.

Original languageEnglish
Pages (from-to)477-508
Number of pages32
JournalNuclear Physics, Section B
Issue number2-3
Publication statusPublished - Oct 17 1988

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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