Symmetries of Four-dimensional String Effective Action with Cosmological Constant

Details Symmetries of Four-dimensional String Effective Action with Cosmological Constant Symmetries of Four-dimensional String Effective Action with Cosmological Constant

1995-07-01

arxiv.org/abs/hep-th/9506213v2

Phys.Lett.B368:64-70,1996

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, RevTex file, text is improved, no changes in the final results, also some references are added. (version to appear i

Scientific paper

10.1016/0370-2693(95)01663-5

Classical solutions for a four-dimensional Minkowskian string effective action and an Euclidean one with cosmological constant term are derived. The former corresponds to electrovac solutions whereas the later solutions are identified as gravitational instanton solutions for Fubini-Study metric. The symmetries of the effective actions are identified and new classical solutions are generated by implementing appropriate noncompact transformations. The S-duality transformations on the equations of motion are discussed and it is found that they are S-duality noninvariant due to the presence of cosmological constant term.

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