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Talk
Title	Uplifting Runaways
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Author(s)	Luest, Severin (speaker) (IPhT, CEA Saclay)
Corporate author(s)	CERN. Geneva
Imprint	2019-06-27. - 0:15:18.
Series	(Conferences & Workshops) (String Phenomenology 2019)
Lecture note	on 2019-06-27T14:30:00
Subject category	Conferences & Workshops
Abstract	I will discuss a mechanism which can lead to a possible instability of the KKLT construction for de Sitter vacua. The sphere at the tip of a warped deformed conifold throat can be destabilized by antibranes placed in the throat. Consequently, the stabilization of moduli should not be treated independently from the antibrane uplift in KKLT-like scenarios. This conifold destabilization mechanism can be avoided by turning on a large amount of flux on the sphere, but tadpole cancelation constraints the hierarchy of scales in a type IIB flux compactification. This indicates that antibrane uplift cannot be used to construct stable de Sitter vacua with a small cosmological constant in perturbative string theory.
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Submitted by	elena.gianolio@cern.ch