期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 7, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP07(2019)078
关键词
Thermal Field Theory; CP violation; Neutrino Physics; Resummation
资金
- Swiss National Science Foundation (SNF) [200020-168988]
- Swiss National Science Foundation (SNF) [200020_168988] Funding Source: Swiss National Science Foundation (SNF)
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, similar to 10% of the observed abundance can be generated. Possibilities for increasing the abundance are enumerated.
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