Giant tachyons in the landscape

Bena, Iosif; Graña, Mariana; Kuperstein, Stanislav; Massai, Stefano

doi:10.1007/jhep02(2015)146

Cited by 82 publications

(131 citation statements)

References 57 publications

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“…Of course, supersymmetry must be broken anyway, but it would be preferable to break it spontaneously rather than explicitly. Attempts to realize the KKLT uplifting in supergravity or string theory have failed so far (Bena et al, 2012(Bena et al, , 2013, but opinions differ on the implications of that result. There exist several alternatives to D3-brane uplifting (see e.g.…”

Section: Existence Of De Sitter Vacuamentioning

confidence: 99%

Life at the interface of particle physics and string theory

Schellekens

2013

Rev. Mod. Phys.

130

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If the results of the first LHC run are not betraying us, many decades of particle physics are culminating in a complete and consistent theory for all non-gravitational physics: the Standard Model. But despite this monumental achievement there is a clear sense of disappointment: many questions remain unanswered. Remarkably, most unanswered questions could just be environmental, and disturbingly (to some) the existence of life may depend on that environment. Meanwhile there has been increasing evidence that the seemingly ideal candidate for answering these questions, String Theory, gives an answer few people initially expected: a huge "landscape" of possibilities, that can be realized in a multiverse and populated by eternal inflation. At the interface of "bottomup" and "top-down" physics, a discussion of anthropic arguments becomes unavoidable. We review developments in this area, focusing especially on the last decade.

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Section: Existence Of De Sitter Vacuamentioning

confidence: 99%

Life at the interface of particle physics and string theory

Schellekens

2013

Rev. Mod. Phys.

130

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“…From the analogy with the AdS 7 solution we expect that the singularity gets resolved by polarising the p-brane into a spherical (p + 2)-brane wrapping a finite size 2-sphere inside the S 3 . The non-compact "anti-brane" solutions, that have a flat worldvolume Mink p+1 instead of AdS p+1 cannot be stabilised at finite radius and hence the singularity cannot be resolved that way [46][47][48][49].…”

Section: Jhep03(2015)161mentioning

confidence: 99%

Non-SUSY fractional branes

Kuperstein

Truijen

Riet

2015

J. High Energ. Phys.

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We consider a simplified Ansatz for supergravity solutions describing fractional p-brane solutions (throat geometries supported by fluxes) for various p. For p = 3 the Ansatz captures the Klebanov-Tseytlin (KT) solution. The equations of motion can be derived from an effective action by performing a dimensional reduction to a flat domain wall geometry in p + 2 dimensions. We find an interesting deformation of the known superpotential defining the SUSY domain wall flow. The deformation parameter breaks supersymmetry but still preserves the property that a test Dp brane feels no force inside the throat. The new solutions come in two classes. Both classes have the same UV asymptotics as the KT solution and one class has also similar IR behavior, which makes them potentially interesting holographic backgrounds for studying cascading gauge theories with broken SUSY. We explain furthermore how the curved domain wall solutions of the same (p + 2)-dimensional theories are expected to lift to new AdS compactifications of type IIA/B supergravity.

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“…Analogous, albeit supersymmetric, examples of this type are known to give rise to singularities that are resolved by letting the 3-branes polarise to (p, q)-5 branes [24]. For smeared D3-branes there is a growing body of work that indicates that certain expected polarisation channels seem absent [25][26][27] and others lead to tachyonic modes [28][29][30][31]. Analogous results for fully localized branes are not as strong and a recent paper found that polarised D3-branes can be made regular by fixing boundary values of some fields [32].…”

Section: Jhep03(2017)141 2 Backreaction Effects and Instabilitiesmentioning

confidence: 99%

Unstoppable brane-flux decay of D 6 ¯ $$ \overline{\mathrm{D}6} $$ branes

Danielsson

Gautason

Riet

2017

J. High Energ. Phys.

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We investigate p D6 branes inside a flux throat that carries K × M D6 charges with K the 3-form flux quantum and M the Romans mass. In such a setup brane-flux annihilation can proceed through the nucleation of KK5 branes. We find that within the calculable supergravity regime where g s p is large, the D6 branes annihilate immediately against the fluxes despite the existence of a metastable state at small p/M in the probe approximation. The crucial property that causes this naive conflict with effective field theory is a singularity in the 3-form flux, which we cut off at string scale. Our result explains the absence of regular solutions at finite temperature and suggests there should be a smooth time-dependent solution. We also discuss the qualitative differences between D6 branes and D3 branes, which makes it a priori not obvious to conclude the same instability for D3 branes.

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Giant tachyons in the landscape

Cited by 82 publications

References 57 publications

Life at the interface of particle physics and string theory

Life at the interface of particle physics and string theory

Non-SUSY fractional branes

Unstoppable brane-flux decay of D 6 ¯ $$ \overline{\mathrm{D}6} $$ branes

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