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Journal of High Energy Physics (2013) 002
D3-instantons, Mock Theta Series and Twistors
Sergey Alexandrov 1, Jan Manschot 2, Boris Pioline 3
(02/04/2013)

The D-instanton corrected hypermultiplet moduli space of type II string theory compactified on a Calabi-Yau threefold is known in the type IIA picture to be determined in terms of the generalized Donaldson-Thomas invariants, through a twistorial construction. At the same time, in the mirror type IIB picture, and in the limit where only D3-D1-D(-1)-instanton corrections are retained, it should carry an isometric action of the S-duality group SL(2,Z). We prove that this is the case in the one-instanton approximation, by constructing a holomorphic action of SL(2,Z) on the linearized twistor space. Using the modular invariance of the D4-D2-D0 black hole partition function, we show that the standard Darboux coordinates in twistor space have modular anomalies controlled by period integrals of a Siegel-Narain theta series, which can be canceled by a contact transformation generated by a holomorphic mock theta series.
1 :  Laboratoire Charles Coulomb (L2C)
CNRS : UMR5221 – Université Montpellier II - Sciences et techniques
2 :  Mac Planck Institute for Mathematics, Bonn
inconnue
3 :  Laboratoire de Physique Théorique et Hautes Energies (LPTHE)
CNRS : UMR7589 – Université Pierre et Marie Curie [UPMC] - Paris VI – Université Paris VII - Paris Diderot
Physique/Physique des Hautes Energies - Théorie

Physique/Physique mathématique

Mathématiques/Physique mathématique
Lien vers le texte intégral : 
http://fr.arXiv.org/abs/1207.1109