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Title: Thermodynamics of a Two-Step Electroweak Phase Transition

Abstract

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.

Authors:
ORCiD logo; ; ; ORCiD logo
Publication Date:
Research Org.:
Univ. of Massachusetts, Amherst, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); Jenny and Antti Wihuri Foundation; Swiss National Science Foundation (SNSF); Academy of Finland; National Science Foundation of China; Ernest Rutherford Fellowship; University of Helsinki
OSTI Identifier:
1780507
Alternate Identifier(s):
OSTI ID: 1851476
Grant/Contract Number:  
SC0011095; 200020B-188712; 308791; 320123; 19Z103010239; ST/R003904/1; 324882; 328958
Resource Type:
Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Name: Physical Review Letters Journal Volume: 126 Journal Issue: 17; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; physics; electroweak interaction; hypothetical particle physics models; extensions of Higgs sector; finite temperature field theory; quantum field theory; Monte Carlo methods

Citation Formats

Niemi, Lauri, Ramsey-Musolf, Michael J., Tenkanen, Tuomas V. I., and Weir, David J. Thermodynamics of a Two-Step Electroweak Phase Transition. United States: N. p., 2021. Web. doi:10.1103/PhysRevLett.126.171802.
Niemi, Lauri, Ramsey-Musolf, Michael J., Tenkanen, Tuomas V. I., & Weir, David J. Thermodynamics of a Two-Step Electroweak Phase Transition. United States. https://doi.org/10.1103/PhysRevLett.126.171802
Niemi, Lauri, Ramsey-Musolf, Michael J., Tenkanen, Tuomas V. I., and Weir, David J. Tue . "Thermodynamics of a Two-Step Electroweak Phase Transition". United States. https://doi.org/10.1103/PhysRevLett.126.171802.
@article{osti_1780507,
title = {Thermodynamics of a Two-Step Electroweak Phase Transition},
author = {Niemi, Lauri and Ramsey-Musolf, Michael J. and Tenkanen, Tuomas V. I. and Weir, David J.},
abstractNote = {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.},
doi = {10.1103/PhysRevLett.126.171802},
journal = {Physical Review Letters},
number = 17,
volume = 126,
place = {United States},
year = {Tue Apr 27 00:00:00 EDT 2021},
month = {Tue Apr 27 00:00:00 EDT 2021}
}

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