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It is shown that the dynamics of domain walls in Left-Right symmetric models,separating respective regions of unbroken SU(2)_L and SU(2)_R in the earlyuniverse, can give rise to baryogenesis via leptogenesis. Neutrinos have aspatially varying complex mass matrix due to CP-violating scalar condensates inthe domain wall. The motion of the wall through the plasma generates a flux oflepton number across the wall which is converted to a lepton asymmetry byhelicity-flipping scatterings. Subsequent processing of the lepton excess bysphalerons results in the observed baryon asymmetry, for a range of parametersin Left-Right symmetric models.Comment: v2 version accepted for publication in Phys. Rev. D. Discussion in  Introduction and Conclusion sharpened. Equation (12) corrected. 16 pages, 3  figure files, RevTeX4 styl

Transient domain walls and lepton asymmetry in the left-right symmetric model