On resonant leptogenesis

By Andrea De Simone, A. Riotto. 2007

429 citations recorded by the source corpus.

It has been recently shown that the quantum Boltzmann equations may be relevant for the leptogenesis scenario. In particular, they lead to a time-dependent CP asymmetry which depends upon the previous dynamics of the system. This memory effect in the CP asymmetry is particularly important in resonant leptogenesis where the asymmetry is generated by the decays of nearly mass-degenerate right-handed neutrinos. We study the impact of the nontrivial time evolution of the CP asymmetry in resonant leptogenesis, both in the one-flavour case and with flavour effects included. We show that significant qualitative and quantitative differences arise with respect to the case in which the time dependence of the CP asymmetry is neglected.

Subfields: Artificial Intelligence, Computer Networks and Communications, Molecular Biology

View Paper: https://www.semanticscholar.org/paper/580eebd1c5fc3a118a06cc0a0cd1ea0fc1f50357

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Citations in the corpus

Search for Heavy Right Handed Neutrinos at the FCC-ee (2014, background): “For even larger masses of N another mechanism of baryogenesis – resonant leptogenesis – can operate [31].”
A facility to search for hidden particles at the CERN SPS: the SHiP physics case (2015, background): “For N = 2 the two masses masses M1 and M2 have to be quasi-degenerate in order to explain the observed BAU [707], see [681, 686] (leptogenesis during NI decay) and [324, 397, 415, 416, 703, 704, 708] (leptogenesis during NI production).”
The Phenomenology of Right Handed Neutrinos (2013, background): “The mass bound may also be circumvented if the generated asymmetry is resonantly enhanced by a degeneracy between sterile neutrino masses [410] (resonant leptogenesis).”
Leptogenesis in the Universe (2012, background): “s when the mass dierence between N 1 and N 2 is of the order of the decay widths. Such a scenario has been termed ‘resonant leptogenesis’, and has beneted from many studies in dierent formalisms17 [50, 155, 52, 110, 156, 157, 158, 159, 75, 111, 160, 161, 162, 163, 85, 86, 164, 87, 165, 166, 167, 168”
Standard Model—axion—seesaw—Higgs portal inflation. Five problems of particle physics and cosmology solved in one stroke (2016, background): “The self-energy contributions can be resonantly enhanced in the limit of nearly degenerate RH neutrinos –with mass splittings of the order of the decay widths– which is the mechanism underlying resonant leptogenesis [146, 147].”
A White Paper on keV sterile neutrino Dark Matter (2016, background): “In addition, the heavy singlet neutrinos in this model with a degenerate mass spectrum could be used to explain the observed matter-antimatter asymmetry in the Universe through the mechanism of resonant leptogenesis [393, 781, 782].”