Niemi, Lauri; Ramsey-Musolf, Michael J.; Tenkanen, Tuomas V. I.; Weir, David J. (2021). Thermodynamics of a Two-Step Electroweak Phase Transition. Physical review letters, 126(17) American Physical Society 10.1103/PhysRevLett.126.171802
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New field content beyond that of the standard model of particle physics can alter the thermal history of electroweak symmetry breaking in the early Universe. In particular, the symmetry breaking may have occurred through a sequence of successive phase transitions. We study the thermodynamics of such a scenario in a real triplet extension of the standard model, using nonperturbative lattice simulations. Two-step electroweak phase transition is found to occur in a narrow region of allowed parameter space with the second transition always being first order. The first transition into the phase of nonvanishing triplet vacuum expectation value is first order in a non-negligible portion of the two-step parameter space. A comparison with two-loop perturbative calculation is provided and significant discrepancies with the nonperturbative results are identified.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) 08 Faculty of Science > Institute of Theoretical Physics |
UniBE Contributor: |
Tenkanen, Tuomas Ville Ilmari |
Subjects: |
500 Science > 530 Physics |
ISSN: |
0031-9007 |
Publisher: |
American Physical Society |
Language: |
English |
Submitter: |
Esther Fiechter |
Date Deposited: |
07 Jun 2021 14:07 |
Last Modified: |
19 Jan 2024 23:25 |
Publisher DOI: |
10.1103/PhysRevLett.126.171802 |
ArXiv ID: |
2005.11332 |
BORIS DOI: |
10.48350/156236 |
URI: |
https://boris.unibe.ch/id/eprint/156236 |
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