Chiral gauged WZNW models and heterotic string backgrounds
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Sfetsos, K and Tseytlin, AA (1993) Chiral gauged WZNW models and heterotic string backgrounds Nucl.Phys.B, 415. pp. 116-154.
Full text not available from this repository.Abstract
We construct new heterotic string backgrounds which are analogous to superstring solutions corresponding to coset models but are not simply the `embeddings'of the latter. They are described by the (1,0) supersymmetric extension of the $G/H$ chiral gauged WZNW models. The `chiral gauged' WZNW action differs from the standard gauged WZNW action by the absence of the $A\bar A$-term (and thus is not gauge invariant in the usual sense) but can still be expressed as a combination of WZNW actions and is conformal invariant. We explain a close relation between gauged and chiral gauged WZNW models and prove that in the case of the abelian $H$ the $G/H$ chiral gauged theory is equivalent to a particular $(G\times H)/H$ gauged WZNW theory. In contrast to the gauged WZNW model, the chiral gauged one admits a (1,0) supersymmetric extension which is consistent at the quantum level. Integrating out the $2d$ gauge field we determine the exact (in $\alpha'$) form of the couplings of the corresponding heterotic sigma model. While in the bosonic (superstring) cases all the fields depend (do not depend) non-trivially on $\alpha'$ here the metric receives only one $O(\alpha')$ correction while the antisymmetric tensor and the dilaton remain semiclassical. As a simplest example, we discuss the basic $D=3$ solution which is the heterotic string counterpart of the `black string' $SL(2,R) \times R/ R $ background.
| Item Type: | Article | |||||||||
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| Divisions : | Surrey research (other units) | |||||||||
| Authors : |
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| Date : | 5 August 1993 | |||||||||
| DOI : | 10.1016/0550-3213(94)90069-8 | |||||||||
| Uncontrolled Keywords : | hep-th, hep-th | |||||||||
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| Depositing User : | Symplectic Elements | |||||||||
| Date Deposited : | 17 May 2017 12:27 | |||||||||
| Last Modified : | 24 Jan 2020 22:16 | |||||||||
| URI: | http://epubs.surrey.ac.uk/id/eprint/835379 |
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