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Fermion Scattering off CP-Violating Electroweak Bubble Wall

K. Funakubo·A. Kakuto·S. Otsuki·K. Takenaga·F. Toyoda
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Abstract

A general prescription to solve the Dirac equation in the presence of CP-violating electroweak bubble wall is presented. The profile of the bubble wall is not specified except that the wall height is $m_0$ and zero deep in the broken- and the symmetric-phase regions, respectively, where $m_0$ is a fermion mass given by the Higgs-vacuum-expectation value and the Yukawa coupling. The CP-violating effects are evaluated by regarding CP-violating part of the bubble wall as a perturbation to CP-conserving solutions. The basic quantity, $R_{R\rightarrow L}-\bar R_{R\rightarrow L}$, which would contribute to the cosmological baryon asymmetry, is estimated for some typical profiles of the wall, where $R_{R\rightarrow L}$($\bar R_{R\rightarrow L}$) is the reflection coefficient of right-handed chiral fermion (anti-fermion).

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K. Funakubo, A. Kakuto, S. Otsuki, K. Takenaga, F. Toyoda. 1994-02-05. Fermion Scattering off CP-Violating Electroweak Bubble Wall. https://doi.org/10.1103/physrevd.50.1105

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