On the Erasure and Regeneration of the Primordial Baryon Asymmetry by Sphalerons
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✦ hep-ph
keywords
asymmetrybaryonl-violatingsphaleronsbaryogenesis-basedconstraintscosmologicalderived
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We show that a cosmological baryon asymmetry generated at the GUT scale, which would be destroyed at lower temperatures by sphalerons and possible new B- or L-violating effects, can naturally be preserved by an asymmetry in the number of right-handed electrons. This results in a significant softening of previously derived baryogenesis-based constraints on the strength of exotic B- or L-violating interactions.
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Inverse Electroweak Baryogenesis
The paper proposes inverse electroweak baryogenesis where baryon asymmetry arises from equilibrium sphaleron processes in the presence of a conserved global charge during an inverse phase transition that alters electr...
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