The Dark Dimension in a Warped Throat

Blumenhagen, Ralph; Brinkmann, Max; Makridou, Andriana

doi:10.48550/arxiv.2208.01057

Cited by 5 publications

(7 citation statements)

References 17 publications

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“…Since the KK tower descends from UV in this case, the 4-dimensional EFT description is not reliable. We can find the similar situation in more realistic model like the KKLT or the large volume scenario, in which the uplift potential is generated by D3-branes at the tip of the Klebanov-Strassler throat [22,23]. In this case, the uplift potential and the tower mass scale m satisfy the scaling law m ∼ V α up .…”

Section: Distance Conjecture : Scale Separation and Scaling Lawsupporting

confidence: 62%

“…Since the 4-dimensional cosmological constant Λ 4 is determined by the flux and the uplift as well, we will eventually arrive at the scaling law obeyed by Λ 4 and the KK mass scale. Regarding this, there have been conjectures which try to argue that the tiny value of Λ 4 implies the low tower mass scale [18,19,20,21,22,23]. If it were the case, our universe having Λ 4 ≃ 10 −123 M 4 4 , where M 4 is the 4-dimensional Planck mass, is quite close to the corner of the landscape.…”

Section: Introductionmentioning

confidence: 98%

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Using Infographics for Improving Statistical Thinking Ability

Seo¹,

Lee²

2020

Institute Brain-based Edu Korea National Univ Edu

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We study the late time behavior of the slow-roll parameter in the stringy quintessence model when axion as well as saxion is allowed to move. Even though the potential is independent of the axion at tree level, the axion can move through its coupling to the saxion and the background geometry. Then the contributions of the axion kinetic energy to the slow-roll parameter and the vacuum energy density are not negligible when the slow-roll approximation does not hold. As the dimension of the field space is doubled, the fixed point at which the time variation of the slow-roll parameter vanishes is not always stable. We find that the fixed point in the saxion-axion system is at most partially stable, in particular when the volume modulus and the axio-dilaton, the essential ingredients of the string compactification, are taken into account. It seems that as we consider more saxion-axion pairs, the stability of the fixed point becomes difficult to achieve.

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Section: Distance Conjecture : Scale Separation and Scaling Lawsupporting

confidence: 62%

Section: Introductionmentioning

confidence: 98%

Using Infographics for Improving Statistical Thinking Ability

Seo¹,

Lee²

2020

Institute Brain-based Edu Korea National Univ Edu

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“…Pl . As pointed out in [25], V w up depends on V 0 and |z| in the same way as (m w KK ) 4 . More concretely, comparing (32) with (20) we obtain the scaling behavior…”

Section: Uplift Potential and A Tower Of Statesmentioning

confidence: 70%

“…We point out in this article that the antibrane uplift which plays the crucial role in realizing the metastable dS vacuum [23,24] can be easily connected to the distance conjecture. Indeed, it was already observed in [25] that when the throat is strongly warped, both the KK mass scale m KK and the uplift potential V up produced by D3-branes are redshifted in the same way, satisfying the scaling behavior given by m KK ∼ (V up ) 1/4 . As we will see, the exponent 1/4 originates from the fact that D3-branes are extended over the noncompact four-dimensional spacetime, which reminds us of the argument in [12] that the lower bound on α in (1) given by 1/4 is interpreted as the inverse of the number of noncompact spacetime dimensions.…”

Section: Introductionmentioning

confidence: 83%

Uplift and towers of states in warped throat

Seo¹

2023

Preprint

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We investigate the connection between the distance conjecture and the uplift potential. For this purpose, we consider the concrete model, the warped deformed conifold embedded into Type IIB flux compactifications, with the uplift potential produced by D3-branes at the tip of the throat. Whereas the various mass scales associated with towers of states can be found, it turns out that the lightest tower mass scale satisfies the scaling behavior with respect to the uplift potential, which is meaningful provided the number of D3-branes is nonzero. This indicates that the effective theory becomes invalid in the vanishing limit of the uplift potential by the descent of an infinite tower of states from UV, as predicted in the distance conjecture. Since too large uplift potential is also problematic due to the runaway behavior of the moduli potential as well as the sizeable backreaction of D3-branes, the uplift potential is bounded from both above and below. In the simple model like the KKLT or the large volume scenario in which non-perturbative effect is dominatd by the single term, this bound can be rewritten as the bound on the size of the superpotential.

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“…This seemingly simple model is behind a very rich phenomenology [6,[11][12][13][14]. For example, two dark matter (DM) candidates have been proposed: (i) primordial black holes (PBHs) that were born very early in the life of the universe [12], and (ii) the massive spin-2 KK excitations of the graviton in the dark dimension (dubbed the "dark gravitons") [14].…”

mentioning

confidence: 99%

The Dark Universe: Primordial Black Hole $\leftrightharpoons$ Dark Graviton Gas Connection

Anchordoqui¹,

Antoniadis²,

Lüst³

2022

Preprint

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We study the possible correspondence between 5-dimensional primordial black holes and massive 5-dimensional KK gravitons as dark matter candidate within the recently proposed dark dimension scenario that addresses the cosmological hierarchy problem. First, we show that in the local universe a population of 5-dimensional black holes with M BH ∼ 7 × 10 13 g would be practically indistinguishable from a KK tower of dark gravitons with m DM ∼ 50 keV. Second, we connect the mass increase of 5-dimensional black holes and the related temperature decrease with the cooling of the tower of massive spin-2 KK excitations of the graviton. The dark gravitons are produced at a mass ∼ 1 − 50 GeV and the bulk of their mass shifts down to roughly 1 − 100 keV today. The cooling of the system proceeds via decay to lighter gravitons without losing much total mass density, resembling the intra-tower decays that characterize the cosmological evolution of the dynamical dark matter framework. We associate the intra-tower decays of the graviton gas with the black hole growth through accretion. We also discuss that the primordial black hole dark graviton gas connection can be nicely explained by the bound state picture of black holes in terms of gravitons.

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The Dark Dimension in a Warped Throat

Cited by 5 publications

References 17 publications

Using Infographics for Improving Statistical Thinking Ability

Using Infographics for Improving Statistical Thinking Ability

Uplift and towers of states in warped throat

The Dark Universe: Primordial Black Hole $\leftrightharpoons$ Dark Graviton Gas Connection

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