Singlet-Catalyzed Electroweak Phase Transitions and Precision Higgs Studies

Abstract

We update the phenomenology of gauge singlet extensions of the Standard Model scalar sector and their implications for the electroweak phase transition. Considering the introduction of one real scalar singlet to the scalar potential, we analyze present constraints on the potential parameters from Higgs coupling measurements at the Large Hadron Collider (LHC) and electroweak precision observables for the kinematic regime in which no new scalar decay modes arise. We then show how future precision measurements of Higgs boson signal strengths and Higgs self-coupling could probe the scalar potential parameter space associated with a strong first-order electroweak phase transition. We illustrate using benchmark precision for several future collider options, including the High Luminosity LHC (HL-LHC), the International Linear Collider (ILC), TLEP, China Electron Positron Collider (CEPC), and a 100 TeV proton-proton collider, such as the Very High Energy LHC (VHE-LHC) or the Super proton-proton Collider (SPPC). For the regions of parameter space leading to a strong first order electroweak phase transition, we find that there exists considerable potential for observable deviations from purely Standard Model Higgs properties at these prospective future colliders.

12 pages, 4 figures. Further discussion added on possible impact of future collider options including HL-LHC, ILC, TLEP, CEPC, VHE-LHC, and SppC. Submitted to PRD

References in corpus (11)

• 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
• LHC Phenomenology of an Extended Standard Model with a Real Scalar Singlet
• Singlet Higgs Phenomenology and the Electroweak Phase Transition
• Dark-matter sterile neutrinos in models with a gauge singlet in the Higgs sector
• Minimal Extension of the Standard Model Scalar Sector
• Delta r and the W-boson mass in the Singlet Extension of the Standard Model
• Higgs Self-Coupling as a Probe of Electroweak Phase Transition
• Electroweak Phase Transition and Baryogenesis in the nMSSM
• Improved sphaleron decoupling condition and the Higgs coupling constants in the real singlet-extended SM
• Electroweak Phase Transition and LHC Signatures in the Singlet Majoron Model

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• Two component dark matter with multi-Higgs portals
• Softening Higgs Naturalness - an EFT Analysis