Axially asymmetric fermion scattering off electroweak phase transition bubble walls with hypermagnetic fields

Abstract

We show that in the presence of large scale primordial hypermagnetic fields, it is possible to generate an axial asymmetry for a first order electroweak phase transition. This happens during the reflection and transmission of fermions off the true vacuum bubbles, due to the chiral nature of the fermion coupling with the background field in the symmetric phase. We derive and solve the Dirac equation for such fermions and compute the reflection and transmission coefficients for the case when these fermions move from the symmetric to the symmetry broken phase. We also comment on the possible implications of such axial charge segregation processes for baryon number generation.

8 pages, 2 Encapsulated Postscript figures, uses ReVTeX and epsfig.sty, expanded discussion, version to appear in Phys. Rev. D

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• A Limit on Primordial Small-Scale Magnetic Fields from CMB Distortions
• Tensor Microwave Anisotropies from a Stochastic Magnetic Field
• Influence of the Magnetic Field on the Fermion Scattering off Bubble and Kink Walls
• Can Baryogenesis Survive in the Standard Model Due To Strong Hypermagnetic Field?

Cited by in corpus (10)

• Effective potential at finite temperature in a constant magnetic field I: Ring diagrams in a scalar theory
• Effective potential at finite temperature in a constant hypermagnetic field: Ring diagrams in the Standard Model
• Generation of baryon inhomogeneities in the electroweak phase transition
• Symmetry restoration at finite temperature with weak magnetic fields
• Fermion scattering off electroweak phase transition kink walls with hypermagnetic fields
• Axial charge segregation and CP violation during the electroweak phase transition with hypermagnetic fields
• Dynamics of Walls: Fermion Scattering in Magnetic Field
• Chiral fermion mass and dispersion relations at finite temperature in the presence of hypermagnetic fields
• Charge asymmetry from CP-violating fermion scattering off bubble walls during the electroweak phase transition
• Exact solution for charged-particle propagation during a first-order electroweak phase transition with hypermagnetic fields