Multicomponent Dark Matter from gauge symmetry

Abstract

The composition of Dark Matter (DM) remains an important open question. The current data do not distinguish between single-and multi-component DM, while in theory constructions it is often assumed that DM is composed of a single field. In this work, we study a hidden sector which naturally entails multicomponent DM consisting of spin-1 and spin-0 states. This UV complete set-up is based on SU(3) hidden gauge symmetry with the minimal scalar field content to break it spontaneously. The presence of multiple DM components is a result of a residual Z 2 × Z 2 symmetry which is part of an unbroken global U(1) × Z 2 inherent in the Yang-Mills systems. We find that the model exhibits various parametric regimes with drastically different DM detection prospects. In particular, we find that the direct detection cross section is much suppressed in large regions of parameter space as long as the Standard Model Higgs mixes predominantly with a single scalar from the hidden sector. The resulting scattering rate is often beyond the level of sensitivity of XENON1T, while still being consistent with the thermal WIMP paradigm.

Cancellation Mechanism for Dark-Matter–Nucleon Interaction

“…U(1) breaking terms of higher dimension spoil the cancellation, however, as we show later, these can be highly suppressed when the couplings are treated as spurions. We note that a (technically) similar cancellation was observed in [20], although it occurred for a specific parameter choice and was not based on symmetry.…”

“…An example of such a class is provided by the "secluded dark matter" framework [17] whose main feature is DM annihilation into unstable hidden sector states and which is natural in the Higgs portal construction [18]. Other possibilities explored in the literature include models with special parameter choices, for instance, in order to facilitate the co-annihilation processes [19] or take advantage of some cancellations in the direct detection amplitude [20].…”

The waning of the WIMP? A review of models, searches, and constraints

“…The "dark" and visible sectors can nevertheless be connected by a kinetic mixing operator B μν X μν which can already exist at the tree level, being both Lorentz and gauge invariant, or generated radiatively (for example, if the new gauge sector features new fermions having non-trivial quantum numbers also under the SM gauge group [315]). 32 In the case of a scalar DM it would even be possible to generate a "blind spot" in the scattering cross-section for a rather specific choice of the couplings λ χ H,Φ [221,313] which would induce a destructive interference between the amplitudes associated to the h and S exchange. A different solution for relaxing DD constraints in the presence of multiple scalar singlets coupled to the SM-Higgs has recently been proposed in Ref.…”

Two component WIMP–FImP dark matter model with singlet fermion, scalar and pseudo scalar

“…This light scalar field can be a viable FImP (denoted FImP instead of FIMP for being less massive) type dark matter candidate by assuming it has a sufficiently tiny interaction strength with other particles in the model. A study of thermal two component dark matter has been performed in the literature [136][137][138][139][140]. There is also work relating non-thermal multi component dark matter models explored to address the GC gamma ray excess or dwarf galaxy excess along with 3.55 keV X-ray results [90,141].…”