The trap in the early Universe: impact on the interplay between gravitational waves and LHC physics in the 2HDM

Abstract

We analyze the thermal history of the 2HDM and determine the parameter regions featuring a first-order electroweak phase transition (FOEWPT) and also much less studied phenomena like high-temperature electroweak (EW) symmetry non-restoration and the possibility of vacuum trapping (i.e. the Universe remains trapped in an EW-symmetric vacuum throughout the cosmological evolution, despite at $T=0$ the EW breaking vacuum is deeper). We show that the presence of vacuum trapping impedes a first-order EW phase transition in 2HDM parameter-space regions previously considered suitable for the realization of electroweak baryogenesis. Focusing then on the regions that do feature such a first-order transition, we show that the 2HDM parameter space that would yield a stochastic gravitational wave signal potentially detectable by the future LISA observatory is very contrived, and will be well probed by direct searches of 2HDM Higgs bosons at the HL-LHC, and (possibly) also via measurements of the self-coupling of the Higgs boson at 125 GeV. This has an important impact on the interplay between LISA and the LHC regarding the exploration of first-order phase transition scenarios in the 2HDM: the absence of new physics indications at the HL-LHC would severely limit the prospects of a detection by LISA. Finally, we demonstrate that as a consequence of the predicted enhancement of the self-coupling of the Higgs boson at 125 GeV the ILC would be able to probe the majority of the 2HDM parameter space yielding a FOEWPT through measurements of the self-coupling, with a large improvement in precision with respect to the HL-LHC.

41 pages, 13 figures

References in corpus (25)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• A portrait of the Higgs boson by the CMS experiment ten years after the discovery
• SusHi: A program for the calculation of Higgs production in gluon fusion and bottom-quark annihilation in the Standard Model and the MSSM
• The oblique parameters in multi-Higgs-doublet models
• A precision constraint on multi-Higgs-doublet models
• HiggsSignals-2: Probing new physics with precision Higgs measurements in the LHC 13 TeV era
• Strong First Order Electroweak Phase Transition in the CP-Conserving 2HDM Revisited
• Higgs Self-Coupling as a Probe of Electroweak Phase Transition
• Echoes of the Electroweak Phase Transition: Discovering a second Higgs doublet through $A_0\to H_{0}Z$
• Evolution of hydromagnetic turbulence from the electroweak phase transition
• First principles determination of bubble wall velocity
• From Boltzmann equations to steady wall velocities
• On the gauge dependence of vacuum transitions at finite temperature
• Detection of Early-Universe Gravitational Wave Signatures and Fundamental Physics
• Electroweak bubble wall expansion: gravitational waves and baryogenesis in Standard Model-like thermal plasma
• The Higgs Vacuum Uplifted: Revisiting the Electroweak Phase Transition with a Second Higgs Doublet
• Generation of gravitational waves from freely decaying turbulence
• Gravity Waves from a Cosmological Phase Transition: Gauge Artifacts and Daisy Resummations
• Combining thermal resummation and gauge invariance for electroweak phase transition
• A sonic boom in bubble wall friction
• New constraints on extended Higgs sectors from the trilinear Higgs coupling
• The Flavourful Present and Future of 2HDMs at the Collider Energy Frontier
• Resonant top pair searches at the LHC: a window to electroweak phase transition
• Strongly first-order electroweak phase transition by relatively heavy additional Higgs bosons

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• Prospecting bipartite Dark Matter through Gravitational Waves
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• Phase Transitions and Gravitational Waves in a Model of ${\mathbb{Z}}_3$ Scalar Dark Matter
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• Benchmarking a fading window: electroweak baryogenesis in the C2HDM, LHC constraints after Run 2 and prospects for LISA
• Impact of one-loop corrections to trilinear scalar couplings on di-Higgs production in the RxSM
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• evortran: a modern Fortran package for genetic algorithms with applications from LHC data fitting to LISA signal reconstruction
• Investigating a strong first-order electroweak phase transition in the RxSM at future linear $e^{+}{e}^{-}$ colliders and LISA
• Early Universe hypercharge breaking and neutrino mass generation
• Twin electroweak bubble nucleation and gravitational wave under the $S_3$ symmetry of two-Higgs-doublet model