Orientifolds, RG flows, and closed string tachyons

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We discuss the fate of certain tachyonic closed string theories from two perspectives. In both cases our approach involves studying directly configurations with finite negative tree-level cosmological constant. Closed string analogues of orientifolds, which carry negative tension, are argued to represent the minima of the tachyon potential in some cases. In other cases, we make use of the fact, noted in the early string theory literature, that strings can propagate on spaces of subcritical dimension at the expense of introducing a tree-level cosmological constant. The form of the tachyon vertex operator in these cases makes it clear that a subcritical-dimension ... continued below

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18 pages

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Kachru, Shamit; Kumar, Jason & Silverstein, Eva July 26, 1999.

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Description

We discuss the fate of certain tachyonic closed string theories from two perspectives. In both cases our approach involves studying directly configurations with finite negative tree-level cosmological constant. Closed string analogues of orientifolds, which carry negative tension, are argued to represent the minima of the tachyon potential in some cases. In other cases, we make use of the fact, noted in the early string theory literature, that strings can propagate on spaces of subcritical dimension at the expense of introducing a tree-level cosmological constant. The form of the tachyon vertex operator in these cases makes it clear that a subcritical-dimension theory results from tachyon condensation. Using results of Kutasov, we argue that in some Scherk-Schwarz models, for finely-tuned tachyon condensates, a minimal model CFT times a subcritical dimension theory results. In some instances, these two sets of ideas may be related by duality.

Physical Description

18 pages

Notes

INIS; OSTI as DE00840213

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  • Other Information: PBD: 26 Jul 1999

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  • Report No.: LBNL--43634
  • Grant Number: AC03-76SF00098
  • DOI: 10.2172/840213 | External Link
  • Office of Scientific & Technical Information Report Number: 840213
  • Archival Resource Key: ark:/67531/metadc780369

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  • July 26, 1999

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • April 4, 2016, 1:50 p.m.

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Kachru, Shamit; Kumar, Jason & Silverstein, Eva. Orientifolds, RG flows, and closed string tachyons, report, July 26, 1999; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc780369/: accessed November 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.