Dimensional reduction of the Standard Model coupled to a new singlet scalar field

Abstract

We derive an effective dimensionally reduced theory for the Standard Model augmented by a real singlet scalar. We treat the singlet as a superheavy field and integrate it out, leaving an effective theory involving only the Higgs and $\mathrm{SU}(2{)}_{\mathrm{L}}\times \mathrm{U}(1{)}_Y$ gauge fields, identical to the one studied previously for the Standard Model. This opens up the possibility of efficiently computing the order and strength of the electroweak phase transition, numerically and nonperturbatively, in this extension of the Standard Model. Understanding the phase diagram is crucial for models of electroweak baryogenesis and for studying the production of gravitational waves at thermal phase transitions.

52 pages, 3 figures; v2: references added, additional discussion of temporal gluons, discussion extended with some parameter space scans, published in JHEP

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Cited by in corpus (9)

• On the validity of perturbative studies of the electroweak phase transition in the Two Higgs Doublet model
• The Gravitational-Wave Physics II: Progress
• Real scalar phase transitions: a nonperturbative analysis
• Strong electroweak phase transition in $t$-channel simplified dark matter models
• Bubble Trouble: a Review on Electroweak Baryogenesis
• Non-perturbative determination of the sphaleron rate for first-order phase transitions
• Gravitational waves from supercooled phase transitions in conformal Majoron models of neutrino mass
• Hot news on the phase structure of the SMEFT
• Hard thermal contributions to phase transition observables at NNLO