TeV-scale leptogenesis in the scotogenic model is viable with proper treatment of spectator processes, yielding benchmark points that reproduce the baryon asymmetry and predict observable CLFV rates.
A Matter-Antimatter Universe?
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abstract
We ask whether the universe can be a patchwork consisting of distinct regions of matter and antimatter. We demonstrate that, after recombination, it is impossible to avoid annihilation near regional boundaries. We study the dynamics of this process to estimate two of its signatures: a contribution to the cosmic diffuse gamma-ray background and a distortion of the cosmic microwave background. The former signal exceeds observational limits unless the matter domain we inhabit is virtually the entire visible universe. On general grounds, we conclude that a matter-antimatter symmetric universe is empirically excluded.
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Low-scale leptogenesis in the scotogenic model: spectator processes and benchmark points
TeV-scale leptogenesis in the scotogenic model is viable with proper treatment of spectator processes, yielding benchmark points that reproduce the baryon asymmetry and predict observable CLFV rates.