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Microhalos and dark matter detection
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In this article, the authors used numerical simulations that follow the tidal disruption within the Galactic potential and heating from stellar encounters, finding that neither microhalos nor streams have significant impact on direct detection, implying that dark matter constraints derived using simple smooth halo models are relatively robust.Abstract:
Cosmological structure formation predicts that our galactic halo contains an enormous hierarchy of substructures and streams, the remnants of the merging hierarchy that began with tiny Earth mass microhalos. If these structures persist until the present time, they could influence dramatically the detection signatures of weakly interacting elementary particle dark matter (WIMP). Using numerical simulations that follow the tidal disruption within the Galactic potential and heating from stellar encounters, we find that neither microhalos nor streams have significant impact on direct detection, implying that dark matter constraints derived using simple smooth halo models are relatively robust. We also find that many dense central cusps survive, yielding a small enhancement in the signal for indirect detection experiments.read more
Citations
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Impact of Dark Matter Velocity Distributions on Capture Rates in the Sun
TL;DR: In this article, the authors investigate the effect of the velocity distribution of dark matter in our Galaxy on capture rates in the Sun and find that even extreme cases currently discussed do not decrease the sensitivity of indirect detection significantly.
Journal ArticleDOI
Impact of the dark matter velocity distribution on capture rates in the Sun
TL;DR: In this paper, the authors investigate the effect of the velocity distribution of dark matter in our Galaxy on capture rates in the Sun and find that even extreme cases currently discussed do not decrease the sensitivity of indirect detection significantly.
Dissertation
Study of capture and annihilation of a few GeV WIMPs inside the Sun by using an underground neutrino detector
TL;DR: In this article, the effect of uncertainties from the velocity distribution of WIMPs in the solar WIMP search are precisely evaluated, and it is shown that the impacts of the uncertainties on the velocity distributions are not significant.
Posted Content
Warning about Dark Matter Direct Detection in the Presence of LIGO-Motivated Primordial Black Holes
TL;DR: In this paper, the formation of dark matter mini-halos around primordial black holes (PBHs) and its implication on DM direct detection experiments was discussed and high-resolution simulations were encouraged.
References
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Particle dark matter: Evidence, candidates and constraints
TL;DR: The current status of particle dark matter, including experimental evidence and theoretical motivations, including direct and indirect detection techniques, is discussed in this paper. But the authors focus on neutralinos in models of supersymmetry and Kaluza-Klein dark matter in universal extra dimensions.
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A novel determination of the local dark matter density
TL;DR: In this article, the authors present a novel study on the problem of constructing mass models for the Milky Way, concentrating on features regarding the dark matter halo component, and the main result of this analysis is a novel determination of the local dark-matter halo density which, assuming spherical symmetry and either an Einasto or an NFW density profile is found to be around 0.39 GeV cm −3 with a 1-��
Journal ArticleDOI
Earth-mass dark-matter haloes as the first structures in the early Universe.
TL;DR: Supercomputer simulations of the concordance cosmological model, which assumes neutralino dark matter (at present the preferred candidate), are reported, and it is found that the first objects to form are numerous Earth-mass dark-matter haloes about as large as the Solar System.
Journal ArticleDOI
A novel determination of the local dark matter density
TL;DR: In this paper, the authors present a novel study on the problem of constructing mass models for the Milky Way, concentrating on features regarding the dark matter halo component, which is very important for interpreting direct dark matter detection experiments.