Moduli stabilization in non-supersymmetric Minkowski vacua with anomalous U(1) symmetry

Gallego, Diego; Serone, Marco

doi:10.1088/1126-6708/2008/08/025

Cited by 15 publications

(17 citation statements)

References 58 publications

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“…An additional matter F term, driven by the cancelation of an anomalous U(1) A D-term, is the seed for successful up-lifting. Note, similar analyses in the literature have also used an anomalous U(1) A D-term in coordination with other perturbative or non-perturbative terms in the superpotential to accomplish SUSY breaking and up-lifting [169,170]. The discussion in Ref.…”

Section: Supersymmetry Breaking and Moduli Stabilizationmentioning

confidence: 97%

Searching for the standard model in the string landscape: SUSY GUTs

Raby¹

2011

Rep. Prog. Phys.

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Abstract. The Standard Model is the theory describing all observational data from the highest energies to the largest distances. [There is however one caveat; additional forms of energy, not part of the Standard Model, known as dark matter and dark energy must be included in order to describe the universe at galactic scales and larger.] High energies refers to physics at the highest energy particle accelerators, including CERN's LEP II (which ceased operation in 2000 to begin construction of the LHC or Large Hadron Collider now operating) and Fermilab's Tevatron, as well as to the energies obtained in particle jets created in so-called active gallactic nuclei scattered throughout the visible universe. Some of these extra-galactic particles bombard our own earth in the form of cosmic rays, or super-energetic protons which scatter off nucei in the upper atmosphere.String theory is, on the other hand, an unfinished theoretical construct which attempts to describe all matter and their interactions in terms of the harmonic oscillations of open and/or closed strings. It is regarded as unfinished since at the present it is a collection of ideas, tied together by powerful consistency conditions, called dualities, with the ultimate goal of finding the completed String Theory. At the moment we only have descriptions which are valid in different mutually exclusive limits with names like, Type I, IIA, IIB, heterotic, M and F theory. The string landscape has been described in the pages of many scholarly and popular works. It is perhaps best understood as the collection of possible solutions to the string equations. Albeit these solutions look totally different in the different limiting descriptions. What do we know about the String Landscape? We know that there are such a large number of possible solutions that the only way to represent this number is as 10 500 or a one followed by 500 zeros. Note this isn't a precise value since the uncertainty is given by a number just as large. Moreover, we know that most of these string states look nothing like the Standard Model. They have the wrong matter and wrong forces. Moreover they are not off by a small amount, they are totally wrong.So the question becomes, does string theory really describe our observable world? In order to address this question, one must find at least one string state that resembles it. One possibility is that our observable world is in fact a unique string state. If this is the case, then the problem becomes one of finding the proverbial needle in the largest possible haystack! On the other hand, there may be many states which are sufficiently close to the observable world, and we need only to understand why we are in this finite subspace of the string landscape. And perhaps there are good reasons, why this subspace is preferred over 99.999999999...% of the myriad of non-Standard-Model-like string states. Perhaps, just by confining our attention to this subspace we can learn something about our observable world which we can not learn otherwise. Thus the § rab...

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Section: Supersymmetry Breaking and Moduli Stabilizationmentioning

confidence: 97%

Searching for the standard model in the string landscape: SUSY GUTs

Raby¹

2011

Rep. Prog. Phys.

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“…(4.2). This kind of uplifting as been exploited in several works so far [14][15][16][17][18][19][20][21][22][23][24][25][26][27]. Another possibility for this kind of uplifting is to consider perturbative corrections, α or string loops, to the Kähler potential which might lead to important contributions potentially able to uplift the vacuum [33][34][35].…”

Section: F-term Upliftingmentioning

confidence: 99%

Effective upliftings in Large volume compactifications

Gallego

2015

Nuclear and Particle Physics Proceedings

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After reviewing several mechanisms proposed to get a dS/Minkowski vacuum in moduli stabilization scenarios of type-IIB superstring orientifold compactifications we propose a criterium for characterizing those that may effectively lead to a positive small cosmological constant. We suggest that the variation in the expectation value of a good uplifting term, due to the shift in the minimum of the potential after uplifting, is much smaller than the original cosmological constant. This is studied with some detail in Large volume scenarios where the dependency on the volume direction is rather generic and easy to spot. Here we find that an uplifting term in the potential, with generic form V up ∼ 1/V γ , should be restricted to the one satisfying γ 2 12. Such a bound might explain why in models previously studied no uplifting has been achieved, and gives motivations to study a novel proposal of dilaton dependent uplifting mechanism for which no numerical studies has been performed before. We find that in this case it is actually possible to get a dS vacuum, but still leave open the question of a more precise discrimination feature the good uplifting mechanisms should satisfy.

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“…As yet another possibility, albeit technically unfeasible, all the fields may be fixed at the same time. FI D-terms [66,67] and matter fields active during moduli stabilisation [66][67][68][69][70] have been noted to help produce de Sitter/Minkowski vacua.…”

Section: Jhep01(2011)071mentioning

confidence: 99%

On moduli stabilisation and de Sitter vacua in MSSM heterotic orbifolds

Parameswaran

Ramos‐Sánchez

Zavala³

2011

J. High Energ. Phys.

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Abstract:We study the problem of moduli stabilisation in explicit heterotic orbifold compactifications, whose spectra contain the MSSM plus some vector-like exotics that can be decoupled. Considering all the bulk moduli, we obtain the 4D low energy effective action for the compactification, which has contributions from various, computable, perturbative and non-perturbative effects. Hidden sector gaugino condensation and string worldsheet instantons result in a combination of racetrack, KKLT-like and cusp-form contributions to the superpotential, which lift all the bulk moduli directions. We point out the properties observed in our concrete models, which tend to be missed when only "generic" features of a model are assumed. We search for interesting vacua and find several de Sitter solutions, but so far, they all turn out to be unstable.

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Moduli stabilization in non-supersymmetric Minkowski vacua with anomalous U(1) symmetry

Cited by 15 publications

References 58 publications

Searching for the standard model in the string landscape: SUSY GUTs

Searching for the standard model in the string landscape: SUSY GUTs

Effective upliftings in Large volume compactifications

On moduli stabilisation and de Sitter vacua in MSSM heterotic orbifolds

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