Leptogenesis via Collisions: Leaking Lepton Number to the Hidden Sector

Details Leptogenesis via Collisions: Leaking Lepton Number to the Hidden Sector Leptogenesis via Collisions: Leaking Lepton Number to the Hidden Sector

2001-07-26

arxiv.org/abs/hep-ph/0107281v3

Phys.Rev.Lett. 87 (2001) 231304

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1103/PhysRevLett.87.231304

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 $l \phi > l' \phi', \bar l' \bar phi'$ mediated by the heavy Majorana neutrinos $N$ of the seesaw mechanism, where $l$ and $\phi$ are ordinary lepton and Higgs doublets and $l'$, $\phi'$ 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 $10^{9}$ GeV.

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