Publication : t02/035

Non-compact Calabi--Yau Manifolds and Localized Gravity

Antoniadis I. (Theory Division, European Organization for Nuclear Research, CERN, CH-1211 Genève 23, Switzerland (Suisse))
Minasian R. (Centre de Physique Théorique (CPhT), CNRS, Ecole Polytechnique, F-91128 Palaiseau, France)
Vanhove P. (CEA, DSM, SPhT (Service de Physique Théorique), F-91191 Gif-sur-Yvette, FRANCE)
We study localization of gravity in flat space in superstring theory. We find that an induced Einstein-Hilbert term can be generated only in four dimensions, when the bulk is a non-compact Calabi-Yau threefold with non-vanishing Euler number. The origin of this term is traced to R^4 couplings in ten dimensions. Moreover, its size can be made much larger than the ten-dimensional gravitational Planck scale by tuning the string coupling to be very small or the Euler number to be very large. We also study the width of the localization and discuss the problems for constructing realistic string models with no compact extra dimensions.
Année de publication : 2003
Revue : Nucl. Phys. B 648 69-93 (2003)
Preprint : arXiv:hep-th/0209030
Numéro Exterieur : CERN-TH/2002-220 ; CPHT-RR/067.0902
Langue : Anglais

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