String loop corrections to the universal hypermultiplet

P. Vanhove (1, 2) , Ignatios Antoniadis (1) , Stefan Theisen , Ruben Minasian (3)

1 CERN - European Organization for Nuclear Research
2 SPhT - Service de Physique Théorique
3 CPHT - Centre de Physique Théorique [Palaiseau]

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.

Domaines: Physique des Hautes Energies - Théorie [hep-th]

P. Vanhove, Ignatios Antoniadis, Stefan Theisen, Ruben Minasian. String loop corrections to the universal hypermultiplet. 2003. ⟨hal-00003318⟩