Warm dark matter in low scale left-right theory

Journal Article · Sun Jul 01 04:00:00 EDT 2012 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2012/07/006· OSTI ID:22279836

Nemevšek, Miha; Senjanović, Goran; Zhang, Yue ^[1]

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1. International Centre for Theoretical Physics, Strada Costiera 11, Trieste 34014 (Italy)

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.

• OSTI ID: 22279836
• Journal Information: Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 07 Vol. 2012; ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ASTROPHYSICS
BOLTZMANN EQUATION
BOSONS
COSMOLOGY
DENSITY
ENTROPY
KEV RANGE
MASS
NEUTRINOS
NONLUMINOUS MATTER
NUMERICAL ANALYSIS
PHASE TRANSFORMATIONS
QUANTUM CHROMODYNAMICS
SYMMETRY
TEV RANGE
UNIVERSE