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KeV warm dark matter and composite neutrinos

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Abstract

Elementary keV sterile Dirac neutrinos can be a natural ingredient of the composite neutrino scenario. For a certain class of composite neutrino theories, these sterile neutrinos naturally have the appropriate mixing angles to be resonantly produced warm dark matter (WDM). Alternatively, we show these sterile neutrinos can be WDM produced by an entropy-diluted thermal freeze-out, with the necessary entropy production arising not from an out-of-equilibrium decay, but rather from the confinement of the composite neutrino sector, provided there is sufficient supercooling.

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  1. Laboratory for Elementary-Particle Physics, Cornell University, Ithaca, N.Y, U.S.A

    Dean J. Robinson & Yuhsin Tsai

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  1. Dean J. Robinson
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  2. Yuhsin Tsai
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Correspondence to Dean J. Robinson.

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ArXiv ePrint: 1205.0569

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Robinson, D.J., Tsai, Y. KeV warm dark matter and composite neutrinos. J. High Energ. Phys. 2012, 161 (2012). https://doi.org/10.1007/JHEP08(2012)161

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  • DOI: https://doi.org/10.1007/JHEP08(2012)161

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