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-violating effects on gravitational waves in a complex singlet extension of the Standard Model with degenerate scalars

Cho, Gi-Chol; Idegawa, Chikako; Senaha, Eibun

doi:10.1103/physrevd.106.115012

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2024

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Cited by 4 publications

(1 citation statement)

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“…When the masses of the two are close, it is hard to experimentally distinguish between h 1 and h 2 . The possibility of verifying such a degenerate scalar scenario in future collider experiments [6], strong first-order electroweak phase transitions [8], observation of the gravitational wave [9] have been investigated. Also, the realization of the degenerate scalar scenario has been analyzed based on the multi-critical point principle [10,11] in ref.…”

Section: Introductionmentioning

confidence: 99%

A complex singlet extension of the standard model and multi-critical point principle

2023

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Section: Introductionmentioning

confidence: 99%

A complex singlet extension of the standard model and multi-critical point principle

2023

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Analyzing cancellation mechanism of the dark matter-quark scattering in a complex singlet extension of the Standard Model

Cho

Idegawa

2023

Nuclear Physics B

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Gravitational waves from domain wall collapses and dark matter in the SM with a complex scalar field

Pham,

Senaha

2024

Phys. Rev. D

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We study a domain wall induced by spontaneously broken Z2 symmetry and its gravitational wave signature in the standard model with a complex scalar in connection with dark matter physics. In a minimal setup, a linear term of the singlet field is added to the scalar potential as an explicit Z2 breaking term to make the domain wall unstable. We obtain its minimal size from cosmological constraints and show that the parameter space that can be probed by current and future pulsar time array experiments requires the vacuum expectation value of the singlet field to be greater than O(10–100) TeV, along with a singletlike Higgs mass of O(1–100) TeV. However, such a region is severely restricted by the dark matter relic density, which places an upper bound on the singlet vacuum expectation value at approximately 200 TeV, and limits the dark matter mass to about half of the singletlike Higgs boson mass. Published by the American Physical Society 2024

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CP -violating effects on gravitational waves in a complex singlet extension of the Standard Model with degenerate scalars

Cited by 4 publications

References 101 publications

A complex singlet extension of the standard model and multi-critical point principle

A complex singlet extension of the standard model and multi-critical point principle

Analyzing cancellation mechanism of the dark matter-quark scattering in a complex singlet extension of the Standard Model

Gravitational waves from domain wall collapses and dark matter in the SM with a complex scalar field

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