Speaker
Martina Cataldi
(University of Hamburg)
Description
We propose a novel non-thermal realisation for leptogenesis that relies on the out-of-equilibrium decay of an axion-like particle (ALP) into right-handed Majorana neutrinos (RHN) in the Early Universe, and that it opens the parameter space of successful leptogenesis down to TeV-scale RHNs, with values of $f_a > 10^{11}$ GeV and $m_a > 10^{4}$ GeV for the ALP decay constant and mass.
We also explore the region where the ALP induces a matter-dominated phase and, finally, provide a viable suspersymmetric realisation of ALP leptogenesis which solves the cosmological gravitino problem.
| Would you be interested in presenting a poster? (this will not impact the decision on your talk) | yes |
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Author
Martina Cataldi
(University of Hamburg)
Co-authors
Alberto Mariotti
(Vrije Universiteit Brussel)
Filippo Sala
Miguel Vanvlasselaer
(VUB)
Silvia Pascoli
(Universita e INFN, Bologna (IT))
