HAL : hal-00518356, version 1

arXiv : 1009.3026

DOI : 10.1103/PhysRevD.83.026001

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Physical Review D 83 (2011) 026001

On the topology of the hypermultiplet moduli space in type II/CY string vacua

Sergei Alexandrov 1, Daniel Persson, Boris Pioline 2

(05/01/2011)

By analyzing qualitative aspects of NS5-brane instanton corrections, we determine the topology of the hypermultiplet moduli space M_H in Calabi-Yau compactifications of type II string theories at fixed value of the dilaton and of the Calabi-Yau metric. Specifically, we show that for fivebrane instanton couplings to be well-defined, translations along the intermediate Jacobian must induce non-trivial shifts of the Neveu-Schwarz axion which had thus far been overlooked. As a result, the Neveu-Schwarz axion parametrizes the fiber of a circle bundle, isomorphic to the one in which the fivebrane partition function is valued. In a companion paper [1], we go beyond the present analysis and take steps towards a quantitative description of fivebrane instanton corrections, using a combination of mirror symmetry, S-duality, topological string theory and twistor techniques.

1 :	Laboratoire de Physique Théorique et Astroparticules (LPTA)
	CNRS : UMR5207 – IN2P3 – Université Montpellier II - Sciences et techniques
2 :	Laboratoire de Physique Théorique et Hautes Energies (LPTHE)
	CNRS : UMR7589 – Université Pierre et Marie Curie [UPMC] - Paris VI – Université Paris VII - Paris Diderot

Domaine

:

Physique/Physique des Hautes Energies - Théorie

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Contributeur : Boris Pioline <>

Soumis le : Vendredi 17 Septembre 2010, 09:38:33

Dernière modification le : Mardi 19 Juillet 2011, 15:47:43