Signals of the electroweak phase transition at colliders and gravitational wave observatories

Chala, Mikael; Krause, Claudius; Nardini, Germano

doi:10.1007/jhep07(2018)062

Cited by 107 publications

(96 citation statements)

References 101 publications

(173 reference statements)

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“…This is what we do, as included in the Lagrangian in Equation that thermal tunneling needs to be at some stage faster than the Hubble rate [16]. This statement only applies in the absence of modifications to the gauge couplings.…”

Section: Varying the Weak Coupling Constant And The Electroweak Phasementioning

confidence: 72%

“…This formalism allows us to introduce the operators required to satisfy the Sakharov conditions, as well as modify the SM gauge couplings. The effect of operators required to ensure a first order phase transition and provide new CP violation are well understood, and have been studied extensively in the literature [12][13][14][15][16][17]. The novel aspect of our work is to include dimension-5 operators involving new scalar fields, which change the effective gauge couplings in the early universe.…”

Section: Introductionmentioning

confidence: 99%

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Electroweak baryogenesis from temperature-varying couplings

Ellis

Ipek

White

2019

J. High Energ. Phys.

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The fundamental couplings of the Standard Model are known to vary as a function of energy scale through the Renormalisation Group (RG), and have been measured at the electroweak scale at colliders. However, the variation of the couplings as a function of temperature need not be the same, raising the possibility that couplings in the early universe were not at the values predicted by RG evolution. We study how such temperaturevariance of fundamental couplings can aid the production of a baryon asymmetry in the universe through electroweak baryogenesis. We do so in the context of the Standard Model augmented by higher-dimensional operators up to dimension 6.

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Section: Varying the Weak Coupling Constant And The Electroweak Phasementioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Electroweak baryogenesis from temperature-varying couplings

Ellis

Ipek

White

2019

J. High Energ. Phys.

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“…Hence, this model predicts striking same-sign multilepton signatures at the LHC due to the presence of multicharged scalars and vectorlike leptons. Scalar quadruplets can be very interesting for electroweak phase transition as well [10].…”

Section: Introductionmentioning

confidence: 99%

Neutrino mass from Higgs quadruplet and multicharged Higgs searches at the LHC

2018

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In this paper, we revisit the dimension-7 neutrino mass generation mechanism based on the addition of an isospin 3=2 scalar quadruplet and two vectorlike isotriplet leptons to the standard model. We discuss the LHC phenomenology of the charged scalars of this model, complemented by the electroweak precision and lepton flavor violation constraints. We pay particular attention to the triply charged and doubly charged components. We focus on the same-sign-trilepton signatures originating from the triply charged scalars and find a discovery reach of 600-950 GeV at 3 ab −1 of integrated luminosity at the LHC. On the other hand, doubly charged Higgs has been an object of collider searches for a long time, and we show how the present bounds on its mass depend on the particle spectrum of the theory. Strong constraints on the model parameter space can arise from the measured decay rate of the standard model Higgs to a pair of photons as well.

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“…The conventional choice of the temperature at which the above condition is evaluated is T c , but a more precise timing is the nucleation temperature T n (see e.g., Ref. [9,108,109]), which we use here. Since generally T n < T c and v h (T n ) > v h (T c ), it might seem at first glance that the above condition is weaker when implemented at T n than at T c .…”

Section: Effective Potentialmentioning

confidence: 99%

Collider and gravitational wave complementarity in exploring the singlet extension of the standard model

Alves

Ghosh

Guo

et al. 2019

J. High Energ. Phys.

131

123

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We present a dedicated complementarity study of gravitational wave and collider measurements of the simplest extension of the Higgs sector: the singlet scalar augmented Standard Model. We study the following issues: (i) the electroweak phase transition patterns admitted by the model, and the proportion of parameter space for each pattern; (ii) the regions of parameter space that give detectable gravitational waves at future space-based detectors; and (iii) the current and future collider measurements of di-Higgs production, as well as searches for a heavy weak diboson resonance, and how these searches interplay with regions of parameter space that exhibit strong gravitational wave signals. We carefully investigate the behavior of the normalized energy released during the phase transition as a function of the model parameters, address subtle issues pertaining to the bubble wall velocity, and provide a description of different fluid velocity profiles. On the collider side, we identify the subset of points that are most promising in terms of di-Higgs and weak diboson production studies while also giving detectable signals at LISA, setting the stage for future benchmark points that can be used by both communities.

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Signals of the electroweak phase transition at colliders and gravitational wave observatories

Cited by 107 publications

References 101 publications

Electroweak baryogenesis from temperature-varying couplings

Electroweak baryogenesis from temperature-varying couplings

Neutrino mass from Higgs quadruplet and multicharged Higgs searches at the LHC

Collider and gravitational wave complementarity in exploring the singlet extension of the standard model

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