Dark Matter signals in solar neutrinos fluxes as probe of non-linear symmetry breaking

TL;DR

This paper investigates how solar neutrino fluxes, resulting from dark matter annihilations in the Sun, can differentiate between linear and non-linear scalar dark matter models, with non-linear models predicting significantly higher fluxes.

Contribution

It introduces a method to distinguish between linear and non-linear scalar dark matter models using solar neutrino flux predictions and analyzes their detectability.

Findings

Non-linear models predict neutrino fluxes up to six orders of magnitude higher than linear models.

Solar neutrino observations can effectively discriminate between different scalar dark matter scenarios.

Predicted fluxes are consistent with current relic density and direct detection constraints.

Abstract

Dark matter (DM) particles gravitationally captured by the Sun can accumulate in its core and subsequently annihilate, producing neutrino fluxes that may be detectable on Earth. The intensity of these fluxes is highly sensitive to the properties of the underlying DM model, especially when the DM candidate is a scalar particle originating from spontaneous or non-linear symmetry breaking mechanisms. In this work, we explore the potential of solar neutrino fluxes to distinguish between the Standard Model extended by a scalar singlet and the non-linear Higgs portal scenarios in the context of a future DM discovery. We compute the expected neutrino fluxes within the regions of parameter space consistent with both relic density and current direct detection limits. Our results show that the non-linear model predicts neutrino fluxes that are systematically larger than those of the linear case, typically by at least one order of magnitude, and up to six orders of magnitude for DM masses around 1 TeV. These findings suggest that solar neutrino observations could provide a valuable probe to discriminate between these competing dark matter frameworks.