Year: 1994
Type: article
Abstract: A general prescription to solve the Dirac equation in the presence of a CP-violating electroweak bubble wall is presented. The profile of the bubble wall is not specified except that the wall height is ${\mathit{m}}_{0}$ and zero deep in the broken- and the symmetric-phase regions, respectively, where ${\mathit{m}}_{0}$ is a fermion mass given by the Higgs vacuum, expectation value and the Yukawa coupling. The CP-violating effects are evaluated by regarding the CP-violating part of the bubble wall as a perturbation to CP-conserving solutions. The basic quantity ${\mathit{R}}_{\mathit{R}\ensuremath{\rightarrow}\mathit{L}}$-R${\mathrm{\ifmmode\bar\else\textasciimacron\fi{}}}_{\mathit{R}\ensuremath{\rightarrow}\mathit{L}}$, which would contribute to the cosmological baryon asymmetry, is estimated for some profiles of the wall, where ${\mathit{R}}_{\mathit{R}\ensuremath{\rightarrow}\mathit{L}}$ (R${\mathrm{\ifmmode\bar\else\textasciimacron\fi{}}}_{\mathit{R}\ensuremath{\rightarrow}\mathit{L}}$) is the reflection coefficient of the right-handed chiral fermion (antifermion).
Authors: Koichi Funakubo, Akira Kakuto, Shoichiro Otsuki, Kazunori Takenaga, Fumihiko Toyoda
Institutions: Kyushu University, Saga University, Kindai University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1584530267