Entropy production by domain wall decay in the NMSSM

Hattori, Hironori; Kobayashi, Tatsuo; Omoto, Naoya; Seto, Osamu

doi:10.1103/physrevd.92.103518

Cited by 18 publications

(19 citation statements)

References 51 publications

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“…It is then possible to avoid the isocurvature constraint by the low-scale inflation, although the upper bound of f QCD depends on the initial misalignment angle of the axion and dilution mechanism after the inflation [9,10,11]. Recently, some of the authors conjectured that, in a certain class of small-field axion inflation derived from type IIB superstring theory [12], 1 the tensor-to-scalar ratio r correlates with the axion decay constant f as follows [13],…”

Section: Introductionmentioning

confidence: 99%

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Constraints on small-field axion inflation

et al. 2017

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We study general class of small-field axion inflations which are the mixture of polynomial and sinusoidal functions suggested by the natural and axion monodromy inflations. The axion decay constants leading to the successful axion inflations are severely constrained in order not to spoil the Big-Bang nucleosynthesis and overproduce the isocurvature perturbation originating from the QCD axion. We in turn find that the cosmologically favorable axion decay constants are typically of order the grand unification scale or the string scale which is consistent with the prediction of closed string

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Section: Introductionmentioning

confidence: 99%

“…3. Here and in the following analysis, we employ the maximal value of the QCD axion decay constant constrained by the upper bound of dark matter abundance, although it depends on the initial misalignment angle of the axion and dilution mechanism after the inflation [9,10,11]. As can be seen in Fig.…”

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confidence: 99%

Constraints on small-field axion inflation

et al. 2017

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“…After the formation of the domain wall after the EWPT, one have the domain wall decay. With the peak frequency is given by the Hubble parameter at the decay time [47]: (46) and peak amplitude of the gravitational waves at the present time t 0 is estimated as [47,48] Ω dw GW h 2 (t 0 ) peak 5.20 × 10 −20 ×˜ gw A 4 10.75 g *…”

Section: B Gw From Domain Wall Decaymentioning

confidence: 99%

Gravitational waves from first-order phase transition and domain wall

Zhou

Yang

Bian

2020

J. High Energ. Phys.

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In many particle physics models, domain wall can form during the phase transition process after discrete symmetry breaking. We study the scenario within a complex singlet extended Standard Model framework, where a strongly first order phase transition can occur depending on the hidden scalar mass and the mixing between the extra heavy Higgs and the SM Higgs mass. The gravitational wave spectrum is of a typical two-peak shape, the amplitude and the peak from the strongly first order phase transition is able to be probed by the future space-based interferometers, and the one locates around the peak from the domain wall decay is far beyond the capability of the current PTA, and future SKA.

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“…For instance, the possibilities of diluting unwanted relics in the domain wall dominated universe are discussed in Refs. [51,52]. However, little is known about the detailed dynamics of domain walls in the domain wall dominated universe, and their behavior in such a scenario is uncertain.…”

Section: Estimation Of Gravitational Waves From Domain Wallsmentioning

confidence: 99%

A Review of Gravitational Waves from Cosmic Domain Walls

2017

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Abstract:In this contribution, we discuss the cosmological scenario where unstable domain walls are formed in the early universe and their late-time annihilation produces a significant amount of gravitational waves. After describing cosmological constraints on long-lived domain walls, we estimate the typical amplitude and frequency of gravitational waves observed today. We also review possible extensions of the standard model of particle physics that predict the formation of unstable domain walls and can be probed by observation of relic gravitational waves. It is shown that recent results of pulser timing arrays and direct detection experiments partially exclude the relevant parameter space, and that a much wider parameter space can be covered by the next generation of gravitational wave observatories.

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Entropy production by domain wall decay in the NMSSM

Cited by 18 publications

References 51 publications

Constraints on small-field axion inflation

Constraints on small-field axion inflation

Gravitational waves from first-order phase transition and domain wall

A Review of Gravitational Waves from Cosmic Domain Walls

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