Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 6, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP06(2012)011
Keywords
Flux compactifications; dS vacua in string theory; Superstring Vacua
Categories
Funding
- EU
- University of Cambridge
- Natural Sciences and Engineering Research Council (NSERC) of Canada
- Government of Canada through Industry Canada
- Province of Ontario through the Ministry of Research and Information (MRI)
- Chinese Academy of Sciences [KJCX2.YW.W10]
- Science and Technology Facilities Council [ST/J000434/1, ST/G000581/1] Funding Source: researchfish
- STFC [ST/J000434/1, ST/G000581/1] Funding Source: UKRI
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We consider a novel scenario for modulus stabilisation in IIB string compactifications in which the Kahler moduli are stabilised by a general set-up with two kinds of non-perturbative effects: (1) standard Raider moduli-dependent non-perturbative effects from gaugino condensation on D7-branes or E3-instantons wrapping four-cycles in the geometric regime; (ii) dilaton-dependent non-perturbative effects from gaugino condensation on space-time filling D3-branes or E(-1)-instantons at singularities. For the LARGE Volume Scenario (LVS), the new dilaton-dependent non-perturbative, effects provide a positive definite contribution to the scalar potential that can be arbitrarily tuned from fluxes to give rise to de Sitter vacua. Contrary to anti D3-branes at warped throats, this term arises from a manifestly supersymmetric effective action. In this new scenario the 'uplifting' term comes from F-terms of blow-up modes resolving the singularity of the non-perturbative quiver. We discuss phenomenological and cosmological implications of this mechanism. This set-up also allows a realisation of the LVS for manifolds with zero or positive Euler number.
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