Flavor cosmology: dynamical yukawas in the Froggatt-Nielsen mechanism

Baldes, Iason; Konstandin, Thomas; Servant, Géraldine

doi:10.1007/jhep12(2016)073

Cited by 37 publications

(81 citation statements)

References 62 publications

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“…We discuss the constraints on the parameters of the effective Lagrangian from both particle physics experiments and cosmology, since probing the nature of the EW phase transition or EW baryogenesis is one important scientific goal for fundamental physics after the discovery In recent years, inspiring works on the dynamical CP violation appeared in Refs. [11][12][13][14]. 2 In this work, we use the angle brackets hi to denote the vacuum expectation value (VEV) of the corresponding field.…”

Section: Introductionmentioning

confidence: 99%

Exploring dynamical CP violation induced baryogenesis by gravitational waves and colliders

2018

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Section: Introductionmentioning

confidence: 99%

Exploring dynamical CP violation induced baryogenesis by gravitational waves and colliders

2018

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“…which can be justified with the following Abelian charges: [27,34,35]. We then focus on the 2-3 submatrix, which dictates the ϕτμ interaction.…”

Section: Yukawa Sector and Lfv Interactionsmentioning

confidence: 99%

Searching for lepton flavor violating flavon decays at hadron colliders

et al. 2018

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The search for flavons with a mass of Oð1Þ TeV at current and future colliders might probe low-scale flavor models. We are interested in the simplest model that invokes the Froggatt-Nielsen mechanism with an Abelian flavor symmetry, which includes a Higgs doublet and a Froggatt-Nielsen complex singlet. Assuming a CP conserving scalar potential, there are a CP-even H F and a CP-odd A F flavons with lepton flavor violating (LFV) couplings. The former can mix with the standard-model-like Higgs boson, thereby inducing tree-level LFV Higgs interactions that may be at the reach of the LHC. We study the constraints on the parameter space of the model from low-energy LFV processes, which are then used to evaluate the flavon decay widths and the gg → ϕ → τμ (ϕ ¼ H F ; A F ) production cross section at hadron colliders. After imposing several kinematic cuts to reduce the standard model main background, we find that for m H F about 200-350 GeV, the decay H F → τμ might be at the reach of the LHC for a luminosity in the range 1-3 ab −1 , however, a luminosity of the order of 10 ab −1 would be required to detect the A F → τμ decay. On the other hand, a future 100 TeV pp collider could probe masses as high as Oð10Þ TeV if it reaches an integrated luminosity of at least 20 ab −1 . Therefore, the 100 TeV Collider could work as a flavon factory.

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“…References [37,38] recently studied the electroweak phase transition in an electroweak-scale implementation of the Froggatt-Nielsen mechanism. We investigate their model in this section.…”

Section: Varying Yukawa Couplingsmentioning

confidence: 99%

Probing the electroweak phase transition with Higgs factories and gravitational waves

2016

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After the discovery of the Higgs boson, understanding the nature of electroweak symmetry breaking and the associated electroweak phase transition has become the most pressing question in particle physics. Answering this question is a priority for experimental studies. Data from the LHC and future lepton collider-based Higgs factories may uncover new physics coupled to the Higgs boson, which can induce the electroweak phase transition to become first order. Such a phase transition generates a stochastic background of gravitational waves, which could potentially be detected by a space-based gravitational wave interferometer. In this paper, we survey a few classes of models in which the electroweak phase transition is strongly first order. We identify the observables that would provide evidence of these models at the LHC and nextgeneration lepton colliders, and we assess whether the corresponding gravitational wave signal could be detected by eLISA. We find that most of the models with first order electroweak phase transition can be covered by the precise measurements of Higgs couplings at the proposed Higgs factories. We also map out the model space that can be probed with gravitational wave detection by eLISA. *

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Flavor cosmology: dynamical yukawas in the Froggatt-Nielsen mechanism

Cited by 37 publications

References 62 publications

Exploring dynamical CP violation induced baryogenesis by gravitational waves and colliders

Exploring dynamical CP violation induced baryogenesis by gravitational waves and colliders

Searching for lepton flavor violating flavon decays at hadron colliders

Probing the electroweak phase transition with Higgs factories and gravitational waves

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