Abstract We study whether a simple Yukawa self-interacting dark-matter model can reproduce an adopted benchmark set of dwarf-, Milky-Way-, group-, and cluster-scale self-interaction targets while remaining compatible with a minimal early-universe viability screen. Using an upgraded hybrid quantum/classical treatment of the transfer cross section, we infer a preferred benchmark region with GeV-scale dark matter, an MeV-scale mediator, and a small dark coupling. Within the adopted public benchmark set, velocity dependence is strongly preferred over a constant self-interaction strength, and the upgraded Yukawa benchmark provides a compact successful realization of that trend. We then test a minimal asymmetric secluded completion against relic-compatibility, residual annihilation bounds, portal-induced dark radiation, and a free-streaming consistency check. The result is a benchmark phenomenology study rather than a raw-data detection claim: it identifies a concrete, falsifiable dark-sector target that is astrophysically motivated and survives a first cosmology-level consistency screen. Files included This record contains the main manuscript PDF together with a supporting archive that includes figures, compact data products, lightweight scripts, and a README describing the contents and intended use of the bundle. Links Homepage: https://johansson.digital
Germund Johansson (Sun,) studied this question.