We calculate coupling constants between ELKO and the Higgs field for the ELKO-Higgs Yukawa coupling, from the requirement to produce ELKO dark matter through freeze-in. We find that extremely small couplings suffice to produce ELKO dark matter through this mechanism.
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Alexander J. Magnus
Rainer Dick
Modern Physics Letters A
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Magnus et al. (Wed,) studied this question.
www.synapsesocial.com/papers/69d896406c1944d70ce07964 — DOI: https://doi.org/10.1142/s021773232640002x