Electroweak phase transition in a complex singlet extension of the Standard Model with degenerate scalars
We study the feasibility of strong first-order electroweak phase transition (EWPT) in a degenerate-scalar scenario of a complex singlet extension of the Standard Model, in which a mass of an additional scalar is nearly degenerate with that of the Higgs boson, 125 GeV. This scenario is known to provi...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-12-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269321007279 |
| _version_ | 1819037556423000064 |
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| author | Gi-Chol Cho Chikako Idegawa Eibun Senaha |
| author_facet | Gi-Chol Cho Chikako Idegawa Eibun Senaha |
| author_sort | Gi-Chol Cho |
| collection | DOAJ |
| description | We study the feasibility of strong first-order electroweak phase transition (EWPT) in a degenerate-scalar scenario of a complex singlet extension of the Standard Model, in which a mass of an additional scalar is nearly degenerate with that of the Higgs boson, 125 GeV. This scenario is known to provide an exquisite solution for circumventing constraints from dark matter direct detection experiments due to cancellations between two scattering amplitudes mediated by two scalars. In the analysis of EWPT, we employ two gauge-invariant calculation schemes on the scalar potential and two familiar resummation methods in evaluating one-loop (gauge dependent) effective potential. We point out that one of the conditions for the strong first-order EWPT is incompatible with the known suppression mechanism of a dark matter cross-section scattering off the nucleons. Nevertheless, we find that strong first-order EWPT is still possible in the degenerate-scalar scenario by dodging dark matter constraints differently. |
| first_indexed | 2024-12-21T08:23:18Z |
| format | Article |
| id | doaj.art-f325d2421d4042878e035a8de3f988e4 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-21T08:23:18Z |
| publishDate | 2021-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-f325d2421d4042878e035a8de3f988e42022-12-21T19:10:24ZengElsevierPhysics Letters B0370-26932021-12-01823136787Electroweak phase transition in a complex singlet extension of the Standard Model with degenerate scalarsGi-Chol Cho0Chikako Idegawa1Eibun Senaha2Department of Physics, Ochanomizu University, Tokyo 112-8610, JapanGraduate school of Humanities and Sciences, Ochanomizu University, Tokyo 112-8610, JapanSubatomic Physics Research Group, Science and Technology Advanced Institute, Van Lang University, Ho Chi Minh City, Viet Nam; Faculty of Technology, Van Lang University, Ho Chi Minh City, Viet Nam; Corresponding author.We study the feasibility of strong first-order electroweak phase transition (EWPT) in a degenerate-scalar scenario of a complex singlet extension of the Standard Model, in which a mass of an additional scalar is nearly degenerate with that of the Higgs boson, 125 GeV. This scenario is known to provide an exquisite solution for circumventing constraints from dark matter direct detection experiments due to cancellations between two scattering amplitudes mediated by two scalars. In the analysis of EWPT, we employ two gauge-invariant calculation schemes on the scalar potential and two familiar resummation methods in evaluating one-loop (gauge dependent) effective potential. We point out that one of the conditions for the strong first-order EWPT is incompatible with the known suppression mechanism of a dark matter cross-section scattering off the nucleons. Nevertheless, we find that strong first-order EWPT is still possible in the degenerate-scalar scenario by dodging dark matter constraints differently.http://www.sciencedirect.com/science/article/pii/S0370269321007279 |
| spellingShingle | Gi-Chol Cho Chikako Idegawa Eibun Senaha Electroweak phase transition in a complex singlet extension of the Standard Model with degenerate scalars Physics Letters B |
| title | Electroweak phase transition in a complex singlet extension of the Standard Model with degenerate scalars |
| title_full | Electroweak phase transition in a complex singlet extension of the Standard Model with degenerate scalars |
| title_fullStr | Electroweak phase transition in a complex singlet extension of the Standard Model with degenerate scalars |
| title_full_unstemmed | Electroweak phase transition in a complex singlet extension of the Standard Model with degenerate scalars |
| title_short | Electroweak phase transition in a complex singlet extension of the Standard Model with degenerate scalars |
| title_sort | electroweak phase transition in a complex singlet extension of the standard model with degenerate scalars |
| url | http://www.sciencedirect.com/science/article/pii/S0370269321007279 |
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