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- W4380046979 abstract "In a singlet pseudoscalar extension of the two-Higgs-doublet model, we discuss spontaneous $CP$ violation electroweak baryogenesis via two different patterns of phase transitions (PTs): (i) two-step PTs whose first step and second step are strongly first order; (ii) three-step PTs whose first step is second order and the second step and third step are strongly first order. For the case of the two-step pattern, the first-step PT takes place at a high temperature, converting the origin phase into an electroweak symmetry-broken phase and breaking the $CP$ symmetry spontaneously. Thus, the baryon number is produced during the first-step PT. At the second-step PT, the phase is converted into the observed vacuum at zero temperature, and the $CP$ symmetry is restored. In both phases, the sphaleron processes are sufficiently suppressed, which keep the baryon number unchanged. For the case of the three-step PTs, the pseudoscalar field first acquires a nonzero vacuum expectation value (VEV), and VEVs of other fields still remain zero during the first-step PT. The following PTs and electroweak baryogenesis are similar to the case of the two-step PTs. In addition, the gravitational wave spectra can have one or two peaks through the two-step and the three-step PTs, and we discuss the detectability at the future gravitational wave detectors." @default.
- W4380046979 created "2023-06-10" @default.
- W4380046979 creator A5005807290 @default.
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- W4380046979 date "2023-06-08" @default.
- W4380046979 modified "2023-09-27" @default.
- W4380046979 title "Spontaneous <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:mrow></mml:math> violation electroweak baryogenesis and gravitational wave through multistep phase transitions" @default.
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- W4380046979 doi "https://doi.org/10.1103/physrevd.107.115008" @default.
- W4380046979 hasPublicationYear "2023" @default.
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