Spin Trio: a dark matter scenario

Abstract

We investigate a beyond Standard Model (SM) featuring five new fields. Four fields encompassing three distinct spin states - scalar ($S$), spinor (${\psi }^{1,2}$), and vector ($V_{\mu }$) - together form the multi-component dark matter (DM), while the fifth (scalar) field ($\varphi$) carries a unit charge under a dark $U_D(1)$ gauge symmetry, enabling SM-DM interactions via the Higgs portal. Although the model maintains classical scale invariance, loop effects break electroweak symmetry. The parameter space is constrained by scale invariance, DM relic density, and direct detection results. Our study aims to identify feasible model regions and evaluate detectability in future experiments. We analyze processes like DM annihilations, semi-annihilations, and conversions, integrating them into Boltzmann equations to calculate DM abundances. Random parameter scans reveal regions compatible with current data, including constraints from direct detection experiments like XENONnT and PandaX-4T . Our results show the model's viability across a broad range of DM masses.

arXiv comment24 pages, 16 figures

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