Logarithmic loop corrections, moduli stabilisation and de Sitter vacua in string theory

Antoniadis, Ignatios; Chen, Yifan; Leontaris, George K. (2020). Logarithmic loop corrections, moduli stabilisation and de Sitter vacua in string theory. Journal of High Energy Physics, 2020(1), p. 149. Springer 10.1007/JHEP01(2020)149

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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 K ̈ahler 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.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Antoniadis, Ignatios

Subjects:

500 Science > 530 Physics

ISSN:

1029-8479

Publisher:

Springer

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

31 Jan 2020 13:28

Last Modified:

31 Jan 2020 13:28

Publisher DOI:

10.1007/JHEP01(2020)149

ArXiv ID:

1909.10525

BORIS DOI:

10.7892/boris.139624

URI:

https://boris.unibe.ch/id/eprint/139624

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