A completely duality invariant effective action of N = 4 heterotic strings

Amit Giveon*, Massimo Porrati

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


We find a low energy effective action for N = 4 strings manifestly invariant under the full O(6,22,Z) internal duality group. That theory is uniquely specified by its gauge symmetry, which turns out to be an infinite dimensional general Kac-Moody algebra. On any string background the Higgs mechanism leaves only finitely many light fields. The corresponding mass spectrum is studied, and shown to agree with string theory. Orbifold truncations to N = 1, 2 theories are discussed.

Original languageAmerican English
Pages (from-to)54-60
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
StatePublished - 23 Aug 1990
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported in part by the Director, Office of Energy Research, Office of High Energy and Nuclear Physics, Division of High Energy Physics of the US Department of Energy under Contract DE-AC03-76SF00098, and in part by the National Science Foundation under Research Grant No. PHY85-15857. Supported in part by a Chaim Weizmann fellowship. E-mail address: [email protected]. On leave of absence from INFN, Sezione di Pisa, I-56100 Pisa, Italy. E-mail address: [email protected].


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