On four-derivative terms in IIB Calabi-Yau orientifold reductions

Abstract

We perform a Kaluza-Klein reduction of IIB supergravity including purely gravitational ${\alpha }^{\prime 3}$-corrections on a Calabi-Yau threefold, and perform the orientifold projection accounting for the presence of $O3/O7$-planes. We consider infinitesimal Kähler deformations of the Calabi-Yau background and derive the complete set of four-derivative couplings quadratic in these fluctuations coupled to gravity. In particular, we find four-derivative couplings of the Kähler moduli fields in the four-dimensional effective supergravity theory, which are referred to as friction couplings in the context of inflation.

19 pages, 0 figures

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Cited by in corpus (2)

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