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Generalised geometry for string corrections
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DOI：10.1007/JHEP11(2014)160.png)
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Abstract
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We present a general formalism for incorporating the string corrections in generalised geometry, which necessitates the extension of the generalised tangent bundle. Not only are such extensions obstructed, string symmetries and the existence of a well-defined effective action require a precise choice of the (generalised) connection. The action takes a universal form given by a generalised Lichnerowitz-Bismut theorem. As examples of this construction we discuss the corrections linear in alpha' in heterotic strings and the absence of such corrections for type II theories.
Keywords:
Superstrings and Heterotic Strings
Differential and Algebraic Geometry
Supergravity Models
Flux compactifications
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