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Mirror Dirac leptogenesis

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arxiv 1903.12192 v3 pith:5V2LWFX4 submitted 2019-03-28 hep-ph

Kevin Earl , Chee Sheng Fong , Thomas Gregoire , Alberto Tonero This is my paper · ORCID
classification hep-ph
keywords leptogenesismirrorasymmetrybaryon-minus-leptondiracleptonmechanismworld
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abstract

We consider a mirror world scenario, in which light Dirac neutrinos are generated from a seesaw mechanism and leptogenesis occurs at high scale without violating lepton number. After leptogenesis, the conservation laws of the theory imply the visible baryon-minus-lepton asymmetry to be equal to the mirror baryon-minus-lepton asymmetry. We extend previous work by presenting a detailed study of this Dirac leptogenesis mechanism by constructing the full set of Boltzmann Equations for both cases of unflavored and flavored regimes. We show that $Z_2$ breaking and lepton/mirror lepton flavor effects can be exploited to enhance the final baryon-minus-lepton asymmetry in our world by several orders of magnitude.

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    A Twin Higgs model with visible-only SU(4) color breaking predicts new Z', charge-1/6 vectors and charge-1/2 fermions, with reduced tuning, lower ΔNeff, and bosonic twin baryon dark matter.

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