Leptogenesis via Collisions: Leaking Lepton Number to the Hidden Sector

Luis Bento; Zurab Berezhiani

doi:10.1103/PhysRevLett.87.231304

paper

Leptogenesis via Collisions: Leaking Lepton Number to the Hidden Sector

arXiv:hep-ph/0107281 · doi:10.1103/PhysRevLett.87.231304

Abstract

We propose a lepto-baryogenesis mechanism in which the non-zero B-L of the universe is produced in out-of-equilibrium, lepton number and CP violating scattering processes that convert ordinary particles into particles of some hidden sector. In particular, we consider the processes $l ϕ > l^{'} ϕ^{'}, l ˉ^{'} p ˉ h i^{'}$ mediated by the heavy Majorana neutrinos $N$ of the seesaw mechanism, where $l$ and $ϕ$ are ordinary lepton and Higgs doublets and $l^{'}$ , $ϕ^{'}$ their hidden counterparts. Such a leptogenesis mechanism is effective even if the reheating temperature is much smaller than the heavy neutrino masses. In particular, it can be as low as $1 0^{9}$ GeV.

4 pages, revtex, 2 figures; as to appear in PRL, supplemented with an additional remark

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External Inversion, Internal Inversion, and Reflection Invariance

Leptogenesis via Collisions: Leaking Lepton Number to the Hidden Sector

Abstract

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