Logarithmic loop corrections, moduli stabilisation and de Sitter vacua in string theory
Abstract We study string loop corrections to the gravity kinetic terms in type IIB com- pactifications on Calabi-Yau threefolds or their orbifold limits, in the presence of D7-branes and orientifold planes. We show that they exhibit in general a logarithmic behaviour in the large volume limit transv...
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Online Access: | https://doi.org/10.1007/JHEP01(2020)149 |
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doaj-6dac21add5764cbbbc2cad602c79fb892021-01-24T12:06:17ZengSpringerOpenJournal of High Energy Physics1029-84792020-01-012020112010.1007/JHEP01(2020)149Logarithmic loop corrections, moduli stabilisation and de Sitter vacua in string theoryIgnatios Antoniadis0Yifan Chen1George K. Leontaris2Laboratoire de Physique Théorique et Hautes Énergies — LPTHE, Sorbonne Université, CNRSLaboratoire de Physique Théorique et Hautes Énergies — LPTHE, Sorbonne Université, CNRSPhysics Department, University of IoanninaAbstract We study string loop corrections to the gravity kinetic terms in type IIB com- pactifications on Calabi-Yau threefolds or their orbifold limits, in the presence of D7-branes and orientifold planes. We show that they exhibit in general a logarithmic behaviour in the large volume limit transverse to the D7-branes, induced by a localised four-dimensional Einstein-Hilbert action that appears at a lower order in the closed string sector, found in the past. Here, we compute the coefficient of the logarithmic corrections and use them to provide an explicit realisation of a mechanism for Kähler moduli stabilisation that we have proposed recently, which does not rely on non-perturbative effects and lead to de Sit- ter vacua. Our result avoids no-go theorems of perturbative stabilisation due to runaway potentials, in a way similar to the Coleman-Weinberg mechanism, and provides a counter example to one of the swampland conjectures concerning de Sitter vacua in quantum grav- ity, once string loop effects are taken into account; it thus paves the way for embedding the Standard Model of particle physics and cosmology in string theory.https://doi.org/10.1007/JHEP01(2020)149Superstring VacuaD-branesFlux compactifications |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ignatios Antoniadis Yifan Chen George K. Leontaris |
spellingShingle |
Ignatios Antoniadis Yifan Chen George K. Leontaris Logarithmic loop corrections, moduli stabilisation and de Sitter vacua in string theory Journal of High Energy Physics Superstring Vacua D-branes Flux compactifications |
author_facet |
Ignatios Antoniadis Yifan Chen George K. Leontaris |
author_sort |
Ignatios Antoniadis |
title |
Logarithmic loop corrections, moduli stabilisation and de Sitter vacua in string theory |
title_short |
Logarithmic loop corrections, moduli stabilisation and de Sitter vacua in string theory |
title_full |
Logarithmic loop corrections, moduli stabilisation and de Sitter vacua in string theory |
title_fullStr |
Logarithmic loop corrections, moduli stabilisation and de Sitter vacua in string theory |
title_full_unstemmed |
Logarithmic loop corrections, moduli stabilisation and de Sitter vacua in string theory |
title_sort |
logarithmic loop corrections, moduli stabilisation and de sitter vacua in string theory |
publisher |
SpringerOpen |
series |
Journal of High Energy Physics |
issn |
1029-8479 |
publishDate |
2020-01-01 |
description |
Abstract We study string loop corrections to the gravity kinetic terms in type IIB com- pactifications on Calabi-Yau threefolds or their orbifold limits, in the presence of D7-branes and orientifold planes. We show that they exhibit in general a logarithmic behaviour in the large volume limit transverse to the D7-branes, induced by a localised four-dimensional Einstein-Hilbert action that appears at a lower order in the closed string sector, found in the past. Here, we compute the coefficient of the logarithmic corrections and use them to provide an explicit realisation of a mechanism for Kähler moduli stabilisation that we have proposed recently, which does not rely on non-perturbative effects and lead to de Sit- ter vacua. Our result avoids no-go theorems of perturbative stabilisation due to runaway potentials, in a way similar to the Coleman-Weinberg mechanism, and provides a counter example to one of the swampland conjectures concerning de Sitter vacua in quantum grav- ity, once string loop effects are taken into account; it thus paves the way for embedding the Standard Model of particle physics and cosmology in string theory. |
topic |
Superstring Vacua D-branes Flux compactifications |
url |
https://doi.org/10.1007/JHEP01(2020)149 |
work_keys_str_mv |
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