On<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msup><mml:mrow><mml:mi>α</mml:mi></mml:mrow><mml:mrow><mml:mo>′</mml:mo></mml:mrow></mml:msup></mml:math>corrections in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si2.gif" overflow="scroll"><mml:mi mathvariant="script">N</mml:mi><mml:mo>=</mml:mo><mml:mn>1</mml:mn></mml:math>F-theory compactifications

Grimm, Thomas W.; Savelli, Raffaele; Weissenbacher, Matthias

doi:10.1016/j.physletb.2013.07.024

Cited by 48 publications

(92 citation statements)

References 38 publications

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“…It therefore remains an open problem to show that these terms are absent in general. However, no such dangerous leading terms have been found in string theory so far, despite extensive attempts to understand them quantitatively, see for example []. It therefore may be that such leading terms are forbidden, or sufficiently suppressed, in string theory due to some as yet unknown reason, or simply that they have not been calculated due to the technical difficulty of the problem.…”

Section: Swampland Tests In String Theorymentioning

confidence: 99%

The Swampland: Introduction and Review

Palti

2019

Fortschritte der Physik

954

1,097

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The Swampland program aims to distinguish effective theories which can be completed into quantum gravity in the ultraviolet from those which cannot. This article forms an introduction to the field, assuming only a knowledge of quantum field theory and general relativity. It also forms a comprehensive review, covering the range of ideas that are part of the field, from the Weak Gravity Conjecture, through compactifications of String Theory, to the de Sitter conjecture.

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Section: Swampland Tests In String Theorymentioning

confidence: 99%

The Swampland: Introduction and Review

Palti

2019

Fortschritte der Physik

954

1,097

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“…Ref. [] showed that

N = 1

O (α^{' 2})

corrections to the effective action give rise to moduli redefinitions, while ref. [] found that

N = 1

O (α^{' 3})

effects produce a shift of the CY Euler number term.…”

Section: De Sitter In String Theorymentioning

confidence: 99%

De Sitter vs Quintessence in String Theory

Cicoli

Alwis

Maharana

et al. 2018

Fortschritte der Physik

190

223

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De Sitter solutions have been recently conjectured to be incompatible with quantum gravity. In this paper we critically assess the progress and challenges of different mechanisms to obtain de Sitter vacua in string compactifications and compare them to quintessence models. We argue that, despite recent criticisms, de Sitter models reached a level of concreteness and calculational control which has been improving over time. On the other hand, building string models of quintessence appears to be more challenging and requires additional fine‐tuning. We discuss the tension between the swampland conjecture and the Higgs potential and find examples which can evade fifth‐force bounds even if they seem very hard to realise in string theory. We also comment on the tension with low‐redshift data and explore ultra‐light axions from string theory as dark energy candidates.

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“…25 Because of the 'extended no-scale structure' [74,75], these corrections are negligible since they scale as V −10/3 whereas V α ′ behaves as V −3 . The last contribution V soft reads: 18) where the soft scalar mass for the matter field φ living in the bulk scales as the gravitino mass m 3/2 = e K/2 |W | ≃ |W 0 |/V suppressed by a factor of order ln(M P /m 3/2 ) [76,77] (c is 25 For recent activity on stringy perturbative corrections see [69][70][71][72][73].…”

Section: Jhep05(2014)001mentioning

confidence: 99%

Explicit de Sitter flux vacua for global string models with chiral matter

Cicoli

Klevers

Krippendorf³

et al. 2014

J. High Energ. Phys.

140

222

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Abstract:We address the open question of performing an explicit stabilisation of all closed string moduli (including dilaton, complex structure and Kähler moduli) in fluxed type IIB Calabi-Yau compactifications with chiral matter. Using toric geometry we construct Calabi-Yau manifolds with del Pezzo singularities. D-branes located at such singularities can support the Standard Model gauge group and matter content or some close extensions. In order to control complex structure moduli stabilisation we consider CalabiYau manifolds which exhibit a discrete symmetry that reduces the effective number of complex structure moduli. We calculate the corresponding periods in the symplectic basis of invariant three-cycles and find explicit flux vacua for concrete examples. We compute the values of the flux superpotential and the string coupling at these vacua. Starting from these explicit complex structure solutions, we obtain AdS and dS minima where the Kähler moduli are stabilised by a mixture of D-terms, non-perturbative and perturbative α ′ corrections as in the LARGE Volume Scenario. In the considered example the visible sector lives at a dP 6 singularity which can be higgsed to the phenomenologically interesting class of models at the dP 3 singularity.

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Onα′corrections inN=1F-theory compactifications

Cited by 48 publications

References 38 publications

The Swampland: Introduction and Review

The Swampland: Introduction and Review

De Sitter vs Quintessence in String Theory

Explicit de Sitter flux vacua for global string models with chiral matter

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