Baryogenesis, Domain Walls and the Role of Gravity

Abstract

It has been recently speculated that global symmetries are broken by gravity. We propose a scenario for the generation of the baryon asymmetry in the early Universe in which the domain walls predicted by theories with discrete symmetries become unstable due to these Planck scale effects. The relative motion of the decaying walls can provide a mechanism for the departure from thermal equilibrium necessary to have a nonvanishing baryon asymmetry. In particular, we implement this idea within the frameworks of the Left-Right and Quark-Lepton symmetric models.

15 pages (LaTeX), PURD-TH-93-06, SISSA-/93/49-A

References in corpus (1)

• Discrete quark-lepton symmetry need not pose a cosmological domain wall problem

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• Baryogenesis from Domain Walls in the Next-to-Minimal Supersymmetric Standard Model
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• Probing Left-Right Symmetry via Gravitational Waves from Domain Walls
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• Spontaneous R-parity breaking, Left-Right Symmetry and Consistent Cosmology with Transitory Domain Walls
• Common Origin of $3.55$ keV X-ray line and Gauge Coupling Unification with Left-Right Dark Matter
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• Spontaneous Parity Breaking, Gauge Coupling Unification and Consistent Cosmology with Transitory Domain Walls
• Effects of Planck Scale Physics on Neutrino Mixing Parameters in Left-Right Symmetric Models
• New ultraviolet operators in supersymmetric SO(10) GUT and consistent cosmology
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• Gravitational wave signature of generic disappearance of $Z_2$-symmetry breaking domain walls
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