On the direct detection of multi-component dark matter: sensitivity studies and parameter estimation
arXiv:1709.01945 · doi:10.1088/1475-7516/2017/11/021
Abstract
We study the case of multi-component dark matter, in particular how direct detection signals are modified in the presence of several stable weakly-interacting-massive particles. Assuming a positive signal in a future direct detection experiment, stemming from two dark matter components, we study the region in parameter space where it is possible to distinguish a one from a two-component dark matter spectrum. First, we leave as free parameters the two dark matter masses and show that the two hypotheses can be significantly discriminated for a range of dark matter masses with their splitting being the critical factor. We then investigate how including the effects of different interaction strengths, local densities or velocity dispersions for the two components modifies these conclusions. We also consider the case of isospin-violating couplings. In all scenarios, we show results for various types of nuclei both for elastic spin-independent and spin-dependent interactions. Finally, assuming that the two-component hypothesis is confirmed, we quantify the accuracy with which the parameters can be extracted and discuss the different degeneracies that occur. This includes studying the case in which only a single experiment observes a signal, and also the scenario of having two signals from two different experiments, in which case the ratios of the couplings to neutrons and protons may also be extracted.
Minor changes. Matches published version in JCAP
References in corpus (17)
- Current status of direct dark matter detection experiments
- Spin-Dependent Macroscopic Forces from New Particle Exchange
- Annual Modulation of Dark Matter in the Presence of Streams
- Direct Detection of Multi-component Secluded WIMPs
- Exothermic Dark Matter
- Complementarity of Dark Matter Direct Detection Targets
- Conceptual design and simulation of a water Cherenkov muon veto for the XENON1T experiment
- Multiple dark matter scenarios from ubiquitous stringy throats
- Mitigating Direct Detection Bounds in Non-minimal Higgs Portal Scalar Dark Matter Models
- Identification of Dark Matter particles with LHC and direct detection data
- Quantifying (dis)agreement between direct detection experiments in a halo-independent way
- The ArDM Liquid Argon Time Projection Chamber at the Canfranc Underground Laboratory: a ton-scale detector for Dark Matter Searches
- Model Independent Direct Detection Analyses
- Improved determination of the WIMP mass from direct detection data
- Probing WIMP particle physics and astrophysics with direct detection and neutrino telescope data
- Isospin-violating dark matter in the light of recent data
- Is the effect of the Sun's gravitational potential on dark matter particles observable?