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Dark origins of matter-antimatter asymmetry
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abstract
In a non-minimal Higgs framework, we present a novel mechanism in which the CP violating dark particles only interact with the SM through the gauge bosons, primarily the $Z$ boson. Such $Z$-portal dark CP violation is realised in the regions of the parameter space where Higgs-mediated (co)annihilation processes are sub-dominant and have negligible contributions to the DM relic density. We show that such $Z$-portal CP violating DM can still thermalise and satisfy all experimental and observational bounds and discuss implications of such phenomena for electroweak baryogenesis.
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Cited by 1 Pith paper
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Baryogenesis from Primordial CP Violation
A three-Higgs-doublet inflation model with a complex coupling to gravity can produce a scalar matter-antimatter asymmetry that electroweak sphalerons convert into a baryon asymmetry.
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