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arXiv · 1607.03913

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

Matthias Weissenbacher
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Abstract

We perform a Kaluza-Klein reduction of IIB supergravity including purely gravitational $α'^3$-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.

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Matthias Weissenbacher. 2016-11-17. On four-derivative terms in IIB Calabi-Yau orientifold reductions. https://doi.org/10.1007/jhep04(2017)063

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