%0 Journal Article
%T On the topology of the hypermultiplet moduli space in type II/CY string vacua
%+ Laboratoire de Physique Théorique et Astroparticules (LPTA)
%+ Laboratoire de Physique Théorique et Hautes Energies (LPTHE)
%A Alexandrov, Sergei
%A Persson, Daniel
%A Pioline, Boris
%Z 5 pages
%< avec comité de lecture
%@ 1550-7998
%J Physical Review D
%I American Physical Society
%V 83
%P 026001
%8 2011-01-05
%D 2011
%Z 1009.3026
%R 10.1103/PhysRevD.83.026001
%Z Physics [physics]/High Energy Physics - Theory [hep-th]Journal articles
%X 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.
%G English
%L hal-00518356
%U https://hal.science/hal-00518356
%~ IN2P3
%~ UNIV-PARIS7
%~ UPMC
%~ LPTA
%~ CNRS
%~ LPTHE
%~ UNIV-MONTP2
%~ UPMC_POLE_2
%~ UNIV-MONTPELLIER
%~ SORBONNE-UNIVERSITE
%~ SU-SCIENCES
%~ UNIV-PARIS
%~ SU-TI
%~ ALLIANCE-SU
%~ UM1-UM2