Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-11-29
Phys.Rev.D52:702-704,1995
Physics
High Energy Physics
High Energy Physics - Phenomenology
7 pages, latex, no figures; misprint in eq.(12) corrected
Scientific paper
10.1103/PhysRevD.52.702
Proceeding from WKB quantization conditions, we derive a semiclassical expression for the current of fermions scattered off a propagating bubble wall in the presence of longitudinal gauge field. It agrees with the expression used by Nasser and Turok in semiclassical analysis of instability of electroweak bubble walls with respect to longitudinal $Z$ condensation. We discuss the resulting dispersion relation for longitudinal $Z$ field and show that light species are important for the analysis of stability, because of their large contribution to plasma frequency.
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