2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/187383We show that axinos, which are dominantly generated by the decay of the next-to-lightest supersymmetric particles produced from the leptonic $Q$-ball ($L$-ball), become warm dark matter suitable for the solution of the missing satellite problem and the cusp problem. In addition, $Ω_b - Ω_{DM}$ coincidence is naturally explained in this scenario.11 pages, no figure, typos corrected, references added, final versionHigh Energy Physics - PhenomenologyAstrophysicstext