Warm dark matter in low scale left-right theory

By M. Nemevšek, Goran Senjanovic, Yue Zhang. 2012

167 citations recorded by the source corpus.

We investigate the viability of having dark matter in the minimal left-right symmetric theory. We find the lightest right-handed neutrino with a mass around keV as the only viable candidate consistent with a TeV scale of left-right symmetry. In order to account for the correct relic density with such low scales, the thermal overproduction of the dark matter in the early universe is compensated by a sufficient late entropy production due to late decay of heavier right-handed neutrinos. We point out that the presence of the right-handed charge-current interactions, operative around the QCD phase transition, has a crucial impact on the amount of dilution, as does the nature of the phase transition itself. A careful numerical study, employing the Boltzmann equations, reveals the existence of a narrow window for the right-handed gauge boson mass, possibly within the reach of LHC (in disagreement with a previous study). We also elaborate on a variety of astrophysical, cosmological and low energy constraints on this scenario.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/dbe84e80faaa23043e0d93475a3c33c74c02f558

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Citations in the corpus

Neutrinoless double beta decay versus other probes of heavy sterile neutrinos (2019, background): “This constraint can naturally be evaded in exotic models [147–150], for example those that inject additional entropy and dilute the dark matter (DM) energy density.”
Present and Future K and B Meson Mixing Constraints on TeV Scale Left-Right Symmetry (2014, background): “The LR a setup has further the capability of addressing also the dark matter issue in a predictive scenario [17].”
Sterile neutrinos in cosmology (2017, background): “Another class of models involve mirror sector [81, 82] or left-right symmetric models [83, 84] which in some cases can provide light eV-scale sterile neutrinos as well as the keV scale dark matter sterile neutrino [85].”
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].”
A facility to search for hidden particles at the CERN SPS: the SHiP physics case (2015, methodology): “The strange see quark determination by all the PDF groups relies mainly on the dimuon data collected by the NuTeV/CCFR collaboration.”
A White Paper on keV sterile neutrino Dark Matter (2016, methodology): “More careful analysis for a minimal left-right symmetric theory was made in [673].”
The Phenomenology of Right Handed Neutrinos (2013, unknown): “in the left-right-symmetric model [522].”
New production mechanism for keV sterile neutrino Dark Matter by decays of frozen-in scalars (2013, background): “For example, the keV sterile neutrino cannot be produced from the thermal plasma only: in case it enters thermal equilibrium, it is typically overproduced since it is relativistic at freeze-out [48, 49].”