Spin Trio: a dark matter scenario

TL;DR

This paper explores a multi-component dark matter model with scalar, spinor, and vector fields, constrained by scale invariance and experimental data, assessing its detectability and viable parameter space.

Contribution

It introduces a novel multi-component dark matter scenario with a dark gauge symmetry, analyzing its phenomenology and experimental constraints.

Findings

Model remains viable across a broad DM mass range.

Parameter space consistent with relic density and direct detection limits.

Future experiments could potentially detect signals from this model.

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} $) - together form the multi-component dark matter (DM), while the fifth (scalar) field ($ \phi $) 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.