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arXiv · 1903.12192

Mirror Dirac leptogenesis

Kevin Earl·Chee Sheng Fong·Thomas Gregoire·Alberto Tonero
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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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Kevin Earl, Chee Sheng Fong, Thomas Gregoire, Alberto Tonero. 2019-03-28. Mirror Dirac leptogenesis. https://doi.org/10.1088/1475-7516%2F2020%2F03%2F036

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