Gravitational waves from a Pati-Salam phase transition

Croon, Djuna; Gonzalo, Tomás E.; White, Graham

doi:10.1007/jhep02(2019)083

Cited by 75 publications

(47 citation statements)

References 114 publications

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“…Particularly well-studied examples include the electroweak phase transition in Beyond the Standard Model (BSM) theories (for recent reviews, see [1,2]), but recently, perturbative phase transitions in hidden sectors (e.g. [3][4][5][6][7][8]), and phase transitions in GUT-theories [9,10] have also been studied.…”

Section: Introductionmentioning

confidence: 99%

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Dynamical axions and gravitational waves

Croon

Houtz

Sanz

2019

J. High Energ. Phys.

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In this paper we explore the possibility of observable gravitational waves as a manifestation of the QCD axion dynamics. In particular, we focus on dynamical axion models which solve the strong CP problem, and include the confinement of a QCD-like gauge group at the TeV scale. We study the resulting chiral symmetry breaking phase transition for models with N F = 3 and N F = 4 light flavors using the linear sigma model. This model describes the scalar meson spectrum and its interactions, with the diagonal field ϕ as the order parameter. We find that the amplitude of the gravitational wave spectrum depends on the mass of the dynamical axion η via the ratio m η /m ϕ . The resulting spectra may be observed at future mid-range gravitational wave experiments such as AION/MAGIS, DECIGO, and BBO. Moreover, the TeV states can be searched for at colliders and their quantum numbers characterized, providing a unique connection between axion physics, gravitational waves and collider searches.

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Section: Introductionmentioning

confidence: 99%

“…For strongly supercooled transitions, these spectra have to be modified to reflect that the sound waves do not last longer than a Hubble time[58,59] 9. A weaker constraint comes from (2.10), κ + 3λ > −µ 2 Σ /4m 2 Σ .…”

mentioning

confidence: 99%

Dynamical axions and gravitational waves

Croon

Houtz

Sanz

2019

J. High Energ. Phys.

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“…However, it is separated from the v h ¼ 0 vacuum by a barrier. Typically, the large distance in field space between the two vacua implies that tunneling is expected to be strongly suppressed before confinement, as the Euclidean bounce action scales as S E =T ∝ ðΔϕ i =ΔVðϕ i ÞÞ 4 ∼ 10 −8 (see, e.g., [21,22]). Hence the Universe is in a metastable state.…”

Section: Benchmark Parameter Spacementioning

confidence: 99%

QCD baryogenesis

Croon¹,

Howard

Ipek

et al. 2020

Phys. Rev. D

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We explore a simple model which naturally explains the observed baryon asymmetry of the Universe. In this model the strong coupling is promoted to a dynamical quantity, which evolves through the vacuum expectation value of a singlet scalar field that mixes with the Higgs field. In the resulting cosmic history, QCD confinement and electroweak symmetry breaking initially occur simultaneously close to the weak scale. The early confinement triggers a chemical potential between baryons and antibaryons through the interactions of the η 0 meson, resulting in spontaneous baryogenesis. The electroweak sphalerons are sharply switched off after confinement and the baryon asymmetry is frozen in. Subsequently, evolution of the Higgs vacuum expectation value (which is modified in the confined phase) triggers a relaxation to a Standard Model-like vacuum. We identify viable regions of parameter space and describe various experimental probes, including current and future collider constraints and gravitational wave phenomenology.

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“…Recent work on gravitational waves from the breaking of a new visible U(1) gauge group that occurs separately from electroweak symmetry breaking includes [14,15,16,17,18].…”

Section: Introductionmentioning

confidence: 99%

Gravitational waves from phase transition in minimal SUSY U(1)B−L model

Haba

Yamada

2020

Phys. Rev. D

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Many extensions of the Standard Model include a new U(1) gauge group that is broken spontaneously at a scale much above TeV. If a U(1)-breaking phase transition occurs at nucleation temperature of O(100)-O(1000) TeV, it can generate stochastic gravitational waves in O(10)-O(100) Hz range if β n /H n = 1000, which can be detected by ground-based detectors. Meanwhile, supersymmetry (SUSY) may play a crucial role in the dynamics of such high-scale U(1) gauge symmetry breaking, because SUSY breaking scale is expected to be at TeV to solve the hierarchy problem. In this paper, we study the phase transition of U(1) gauge symmetry breaking in a SUSY model in the SUSY limit. We consider a particular example, the minimal SUSY U(1) B−L model. We derive the finite temperature effective potential of the model in the SUSY limit, study a U(1) B−L -breaking phase transition, and estimate gravitational waves generated from it.

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Gravitational waves from a Pati-Salam phase transition

Cited by 75 publications

References 114 publications

Dynamical axions and gravitational waves

Dynamical axions and gravitational waves

QCD baryogenesis

Gravitational waves from phase transition in minimal SUSY U(1)B−L model

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