Sterile neutrino dark matter via GeV-scale leptogenesis?

Ghiglieri, Jacopo; Laine, Mikko Sakari (2019). Sterile neutrino dark matter via GeV-scale leptogenesis? Journal of High Energy Physics, 2019(7), 078. Springer 10.1007/JHEP07(2019)078

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It has been proposed that in a part of the parameter space of the Standard Model completed by three generations of keV…GeV right-handed neutrinos, neutrino masses, dark matter, and baryon asymmetry can be accounted for simultaneously. Here we numerically solve the evolution equations describing the cosmology of this scenario in a 1+2 flavour situation at temperatures T ≤ 5 GeV, taking as initial conditions maximal lepton asymmetries produced dynamically at higher temperatures, and accounting for late entropy and lepton asymmetry production as the heavy flavours fall out of equilibrium and decay. For 7 keV dark matter mass and other parameters tuned favourably, ~ 10% of the observed abundance can be generated. Possibilities for increasing the abundance are enumerated.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Ghiglieri, Jacopo and Laine, Mikko Sakari

Subjects:

500 Science > 530 Physics

ISSN:

1029-8479

Publisher:

Springer

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

31 Jul 2019 16:00

Last Modified:

22 Oct 2019 16:48

Publisher DOI:

10.1007/JHEP07(2019)078

ArXiv ID:

1905.08814

BORIS DOI:

10.7892/boris.132256

URI:

https://boris.unibe.ch/id/eprint/132256

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