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Nonperturbative Analysis of the Electroweak Phase Transition in the Two Higgs Doublet Model
Jens O Andersen1, Tyler Gorda2,3, Andreas Helset1,4
1Department of Physics, Faculty of Natural Sciences, Norwegian University of Science and Technology, Høgskoleringen 5, N-7491 Trondheim, Norway.
Physical Review Letters
|November 24, 2018
Summary
We studied the electroweak phase transition (EWPT) in the two Higgs doublet model (2HDM) using a nonperturbative approach. Our findings reveal specific parameter regions supporting a first-order EWPT, consistent with prior research.
Area of Science:
- Particle Physics
- Cosmology
- Quantum Field Theory
Background:
- The Standard Model of particle physics requires extensions to explain phenomena like the electroweak phase transition.
- The two Higgs doublet model (2HDM) is a well-motivated extension of the Standard Model.
Purpose of the Study:
- To investigate the electroweak phase transition (EWPT) in the two Higgs doublet model (2HDM) using a nonperturbative method.
- To identify regions in the 2HDM parameter space that support a first-order EWPT.
Main Methods:
- Derivation of a dimensionally reduced high-temperature effective theory for the 2HDM.
- Matching the effective theory to known results for its phase diagram.
- Nonperturbative analysis of the electroweak phase transition.
Main Results:
- Identification of parameter space regions where the 2HDM exhibits a first-order EWPT.
- Confirmation that a first-order EWPT in the 2HDM is primarily indicated by the mass relation m_{A_{0}}>m_{H_{0}}+m_{Z}.
Conclusions:
- Nonperturbative studies are crucial for a comprehensive understanding of the EWPT in extended models like the 2HDM.
- The mass condition m_{A_{0}}>m_{H_{0}}+m_{Z} serves as a key signature for a first-order EWPT in the 2HDM.
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