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# Christian Stahn : The type IIB effective action, threebranes and instantons

The low energy effective action of the type IIB superstring is given by IIB supergravity. First stringy corrections involve terms with six extra derivatives and can be obtained in an elegant way using a superfield formalism. This talk will be concerned with some recent progress in understanding the IIB superfield. In particular, some non-renormalisation properties of D3-brane supergravity solutions will be demonstrated. The last part of the talk will address higher derivative terms involving three-form fluxes.

**Category**: String Theory**Duration**: 57:23**Date**: October 28, 2004 at 2:45 PM**Views**: 29-
**Tags:**seminar, String Theory Seminar

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