String Loop Corrections to the Universal Hypermultiplet

Antoniadis, Ignatios; Minasian, Ruben; Theisen, Stefan; Vanhove, Pierre

doi:10.1088/0264-9381/20/23/009

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String Loop Corrections to the Universal Hypermultiplet

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Theisen, Stefan
Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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Antoniadis, I., Minasian, R., Theisen, S., & Vanhove, P. (2003). String Loop Corrections to the Universal Hypermultiplet. Classical and Quantum Gravity, 20(23), 5079-5102. doi:10.1088/0264-9381/20/23/009.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-52B6-6

Abstract

We study loop corrections to the universal dilaton supermultiplet for type IIA strings compactified on Calabi-Yau threefolds. We show that the corresponding quaternionic kinetic terms receive non-trivial one-loop contributions proportional to the Euler number of the Calabi-Yau manifold, while the higher-loop corrections can be absorbed by field redefinitions. The corrected metric is no longer Kahler. Our analysis implies in particular that the Calabi-Yau volume is renormalized by loop effects which are present even in higher orders, while there are also one-loop corrections to the Bianchi identities for the NS and RR field strengths.