A 3-3-1 model with exact Z13 symmetry enables infrared freeze-in production of keV-scale warm dark matter via a dimension-6 operator to match the observed relic density while addressing small-scale structure issues.
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Freeze-in Warm Dark Matter via Dimension-6 Operators in 3-3-1 Models
A 3-3-1 model with exact Z13 symmetry enables infrared freeze-in production of keV-scale warm dark matter via a dimension-6 operator to match the observed relic density while addressing small-scale structure issues.