Visible branes with negative tension in heterotic M-theory

Ron Y. Donagi, Justin Khoury, Burt A. Ovrut, Paul J. Steinharclt, Neil Turok

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


It is shown that there exist large classes of BPS vacua in heterotic M-theory which have negative tension on the visible orbifold plane, positive tension on the hidden plane and positive tension, physical five-branes in the bulk space. Explicit examples of such vacua are presented. Furthermore, it is demonstrated that the ratio, ß/ a\, of the bulk five-brane tension to the visible plane tension can, for several large classes of such vacua, be made arbitrarily small. Hence, it is straightforward to find vacua with the properties required in the examples of the Ekpyrotic theory of cosmology -a visible brane with negative tension and ß/\ct\ small. This contradicts recent claims in the literature.

Original languageEnglish (US)
Pages (from-to)XXLI-27
JournalJournal of High Energy Physics
Issue number11
StatePublished - 2001
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


  • M-theory
  • Physics of the early universe


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