A more attractive scheme for radion stabilization and supercooled phase transition

Fujikura, Kohei; Nakai, Yuichiro; Yamada, Masaki

doi:10.1007/jhep02(2020)111

Cited by 45 publications

(42 citation statements)

References 87 publications

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“…Actually, this gives rise to contributions proportional to (∂ ρ u T ) 2 which diverge as r → ∞. Implementing the holographic renormalization procedure, these divergences can be removed by regularizing the above action term with a cut-off r Λ , adding the counterterm 17) and taking the r Λ → ∞ limit. In the above expression, h mn is the boundary metric at r = r Λ and R h is the corresponding Ricci scalar.…”

Section: Jhep12(2020)200mentioning

confidence: 99%

“…We will consider either O(3) symmetric bubbles, for which ρ 2 = x i x i , or O(4) symmetric ones, where ρ 2 = t 2 + x i x i . For instance, in the black hole case, one could start from a O(3)-symmetric ansatz of the form 17) and the other fields left unchanged. In this setup, the temperature of the horizon T h is promoted to a field as well,…”

Section: Holographic Bubblesmentioning

confidence: 99%

“…The main aspects of the above mentioned simple scalar model can be generalized to vacuum decay in gravitational dual descriptions of quantum field theories, a process that has been studied in various papers in the past. Nevertheless, as far as we know, this literature is focused on bottom-up models with AdS geometries, like those relevant for Randall-Sundrum (RS)-like setups [8][9][10][11][12][13][14][15][16][17][18][19][20]. 2 In this paper we try to proceed a step further, studying, for the first time, the dynamics of first-order phase transitions in gauge theories with a precise string embedding.…”

Section: Introductionmentioning

confidence: 99%

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Fate of false vacua in holographic first-order phase transitions

Bigazzi

Caddeo

Cotrone

et al. 2020

J. High Energ. Phys.

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Using the holographic correspondence as a tool, we study the dynamics of first-order phase transitions in strongly coupled gauge theories at finite temperature. Considering an evolution from the large to the small temperature phase, we compute the nucleation rate of bubbles of true vacuum in the metastable phase. For this purpose, we find the relevant configurations (bounces) interpolating between the vacua and we compute the related effective actions. We start by revisiting the compact Randall-Sundrum model at high temperature. Using holographic renormalization, we compute the derivative term in the effective bounce action, that was missing in the literature. Then, we address the full problem within the top-down Witten-Sakai-Sugimoto model. It displays both a confinement/deconfinement and a chiral symmetry breaking/restoration phase transition which, depending on the model parameters, can happen at different critical temperatures. For the confinement/deconfinement case we perform the numerical analysis of an effective description of the transition and also provide analytic expressions using thick and thin wall approximations. For the chiral symmetry transition, we implement a variational approach that allows us to address the challenging non-linear problem stemming from the Dirac-Born-Infeld action.

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Section: Jhep12(2020)200mentioning

confidence: 99%

Section: Holographic Bubblesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fate of false vacua in holographic first-order phase transitions

Bigazzi

Caddeo

Cotrone

et al. 2020

J. High Energ. Phys.

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“…This higher dimensional description has been used to study this PT [24,[35][36][37][38][39][40][41][42], using an ansatz for the bounce configuration describing critical bubbles first introduced in [24]. One might have hoped that the 5D EFT is controlled despite the inevitable breakdown of the 4D dilaton EFT described above.…”

Section: Introductionmentioning

confidence: 99%

Phase transitions from the fifth dimension

Agashe

Ekhterachian

et al. 2021

J. High Energ. Phys.

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We study the cosmological transition of 5D warped compactifications, from the high-temperature black-brane phase to the low-temperature Randall-Sundrum I phase. The transition proceeds via percolation of bubbles of IR-brane nucleating from the black-brane horizon. The violent bubble dynamics can be a powerful source of observable stochastic gravitational waves. While bubble nucleation is non-perturbative in 5D gravity, it is amenable to semiclassical treatment in terms of a “bounce” configuration interpolating between the two phases. We demonstrate how such a bounce configuration can be smooth enough to maintain 5D effective field theory control, and how a simple ansatz for it places a rigorous lower-bound on the transition rate in the thin-wall regime, and gives plausible estimates more generally. When applied to the Hierarchy Problem, the minimal Goldberger-Wise stabilization of the warped throat leads to a slow transition with significant supercooling. We demonstrate that a simple generalization of the Goldberger-Wise potential modifies the IR-brane dynamics so that the transition completes more promptly. Supercooling determines the dilution of any (dark) matter abundances generated before the transition, potentially at odds with data, while the prompter transition resolves such tensions. We discuss the impact of the different possibilities on the strength of the gravitational wave signals. Via AdS/CFT duality the warped transition gives a theoretically tractable holographic description of the 4D Composite Higgs (de)confinement transition. Our generalization of the Goldberger-Wise mechanism is dual to, and concretely models, our earlier proposal in which the composite dynamics is governed by separate UV and IR RG fixed points. The smooth 5D bounce configuration we introduce complements the 4D dilaton/radion dominance derivation presented in our earlier work.

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“…In this paper we cover this issue for the minimal five-dimensional (5D) warp model [1] with a stabilizing field with a bulk polynomial potential. Studies of the holographic phase transition have been performed with great detail in the literature [8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Here we make a step forward in several aspects: (i) We take into account the full backreaction of the scalar field on the gravitational metric, using the superpotential mechanism and methods proposed in Ref.…”

Section: Introductionmentioning

confidence: 99%

Gravitational imprints from heavy Kaluza-Klein resonances

2020

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We systematically study the holographic phase transition of the radion field in a five-dimensional warped model which includes a scalar potential with a powerlike behavior. We consider Kaluza-Klein (KK) resonances with masses m KK at the TeV scale or beyond. The backreaction of the radion field on the gravitational metric is taken into account by using the superpotential formalism. The confinement/ deconfinement first order phase transition leads to a gravitational wave stochastic background which mainly depends on the scale m KK and the number of colors, N, in the dual theory. Its power spectrum peaks at a frequency that depends on the amount of tuning required in the electroweak sector. It turns out that the present and forthcoming gravitational wave observatories can probe scenarios where the KK resonances are very heavy. Current aLIGO data already rule out vector boson KK resonances with masses in the interval m KK ∼ ð1-10Þ × 10 5 TeV. Future gravitational experiments will be sensitive to resonances with masses m KK ≲ 10 5 TeV (LISA), 10 8 TeV (aLIGO Design) and 10 9 TeV (ET). Finally, we also find that the big bang nucleosynthesis bound in the frequency spectrum turns into a lower bound for the nucleation temperature as T n ≳ 10 −4 ffiffiffiffi N p m KK .

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A more attractive scheme for radion stabilization and supercooled phase transition

Cited by 45 publications

References 87 publications

Fate of false vacua in holographic first-order phase transitions

Fate of false vacua in holographic first-order phase transitions

Phase transitions from the fifth dimension

Gravitational imprints from heavy Kaluza-Klein resonances

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