Dark Matter from Split Seesaw

By A. Kusenko, F. Takahashi, T. Yanagida. 2010

133 citations recorded by the source corpus.

Abstract The seesaw mechanism in models with extra dimensions is shown to be generically consistent with a broad range of Majorana masses. The resulting democracy of scales implies that the seesaw mechanism can naturally explain the smallness of neutrino masses for an arbitrarily small right-handed neutrino mass. If the scales of the seesaw parameters are split, with two right-handed neutrinos at a high scale and one at a keV scale, one can explain the matter–antimatter asymmetry of the universe, as well as dark matter. The dark matter candidate, a sterile right-handed neutrino with mass of several keV, can account for the observed pulsar velocities and for the recent data from Chandra X-ray Observatory, which suggest the existence of a 5 keV sterile right-handed neutrino.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/ad1671d02670cb4cd57be3df6738d3240a238d09

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Citations in the corpus

Dark Matter, Baryogenesis and Neutrino Oscillations from Right Handed Neutrinos (2012, background): “Some ideas on the origin of a low seesaw scale can be found in [60–71], see also [72].”
Sterile neutrinos in cosmology (2017, methodology): “This allows splitting of the scales of the seesaw, with two right handed neutrinos at high scale and one at a keV scale, in what is called a split seesaw mechanism [70].”
A White Paper on keV sterile neutrino Dark Matter (2016, background): “The models are the split [672] and the separate [757] seesaw mechanisms, which are considered in a flat five-dimensional space-time.”
The Phenomenology of Right Handed Neutrinos (2013, unknown): “The term “seesaw” is also used for several modifications of this idea [71], such as the “type-II seesaw” [52, 54–57], “type-III” seesaw [60], “split seesaw” [72], “radiative seesaw” [73, 74] or “inverse seesaw” [58, 59].”
Flavor structures of charged fermions and massive neutrinos (2019, background): “Two typical examples of this kind are the so-called neutrino minimal standard model (or νMSM) [620] and the so-called split seesaw model [621], which can not only realize the seesaw and leptogenesis ideas but also accommodate one keV-scale sterile neutrino species as the warm DM candidate.”
New production mechanism for keV sterile neutrino Dark Matter by decays of frozen-in scalars (2013, background): “J C A P 0 3 ( 2 0 1 4 ) 0 2 8 neutrinos thereby range from the application of the Froggatt-Nielsen mechanism [19–21], over flavour symmetries [22–24], extra dimensions [25–27], extensions of the seesaw mechanism [21, 28–34], composite neutrinos [35, 36], global symmetries [37, 38], loop suppressions”
Sterile neutrino Dark Matter (2018, background): “onstant of the right handed SU(2) has the same value as the left handed one. The conclusions apply to other setups in a very similar manner,39 though details related to the breaking of gauge symmetry [464] or a non-minimal SM-singlet fermion sector [465] can aect the nal DM abundance. Data from the ”
Bound-state formation for thermal relic dark matter and unitarity (2014, background): “On the other hand, DM which annihilates less efficiently may have been produced only non-thermally, otherwise it would overclose the universe; candidates in this category are sterile neutrinos [56–62], and axions [63–67].”