  In this analysis we demonstrate the freeze-in realization of a non-abelian
vector boson dark matter (DM). We choose to elaborate an existing $SU(2)_N$
extension ($N$ stands for neutral) of the Standard Model (SM) with an
additional $U(1)=S^{'}$ global symmetry, which stabilizes the vector boson
($X,\bar{X}$) as DM through unbroken $S=T_{3N}+S^{'}$ and as lightest odd $S$
particle. The analysis reveals that the contribution to the freeze-in
production of DM from the decay of a heavier scalar bidoublet $\zeta_1^{0,\pm}
\to \zeta_2^{0,\pm}X$ is important even after the freeze-out of
$\zeta_1^{0,\pm}$ in equilibrium with thermal bath. Moreover, the neutral
component of $SU(2)_N$ scalar triplet ($\Delta$), responsible for neutrino mass
generation in this framework, turns out to serve as additional DMs in the model
and offers a multipartite freeze-in DM set up to explore. The allowed parameter
space is obtained after estimating constraints from CMB, BBN and AMS-02 bound.
This exercise nicely complements the freeze-out realization of ($X,\bar{X}$) as
weakly interacting massive particle (WIMP) and distinguishes it through stable
charge track signature at collider compared to leptonic signal excess as found
in WIMP scenario.

High Energy Physics - Phenomenology