A New Signal Model for Axion Cavity Searches from N-body Simulations

Lentz, Erik W.; Quinn, Thomas; Rosenberg, L.; Tremmel, Michael

doi:10.3847/1538-4357/aa80dd

Cited by 33 publications

(32 citation statements)

References 47 publications

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“…For example, the effects of triaxiality, velocity anisotropy and dark substructures have all received attention in the context of direct DM detection before [4][5][6][7][8][9][54][55][56][57][58][59][60][61][62]. Furthermore, recent analyses using hydrodynamic simulations and astrometric data have suggested that the DM halo may be colder than assumed here [63][64][65][66][67]. Here we merely remark that if this is the case then this would emphasise the presence of S1.…”

Section: Models Of the Halo And S1 Streammentioning

confidence: 83%

Dark matter hurricane: Measuring the S1 stream with dark matter detectors

O’Hare¹,

McCabe²,

Evans³

et al. 2018

Phys. Rev. D

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The recently discovered S1 stream passes through the Solar neighbourhood on a low inclination, counter-rotating orbit. The progenitor of S1 is a dwarf galaxy with a total mass comparable to the present-day Fornax dwarf spheroidal, so the stream is expected to have a significant DM component. We compute the effects of the S1 stream on WIMP and axion detectors as a function of the density of its unmeasured dark component. In WIMP detectors the S1 stream supplies more high energy nuclear recoils so will marginally improve DM detection prospects. We find that even if S1 comprises less than 10% of the local density, multi-ton xenon WIMP detectors can distinguish the S1 stream from the bulk halo in the relatively narrow mass range between 5 and 25 GeV. In directional WIMP detectors such as CYGNUS, S1 increases DM detection prospects more substantially since it enhances the anisotropy of the WIMP signal. Finally, we show that axion haloscopes possess by far the greatest potential sensitivity to the S1 stream if its dark matter component is sufficiently cold. Once the axion mass has been discovered, the distinctive velocity distribution of S1 can easily be extracted from the axion power spectrum.

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Section: Models Of the Halo And S1 Streammentioning

confidence: 83%

Dark matter hurricane: Measuring the S1 stream with dark matter detectors

O’Hare¹,

McCabe²,

Evans³

et al. 2018

Phys. Rev. D

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“…In the inner halo (where the Sun is located), the distribution of DM particles extrapolated via sub-grid methods in high resolution dissipationless simulations like Aquarius is rather smooth [57], so a smooth velocity distribution is a good assumption. Furthermore, recent hydrodynamic simulations [58][59][60][61] have recovered speed distributions for DM that are better approximated by Maxwellian-distributions than their earlier N-body counterparts [3,[6][7][8][9]62]. In this light, the assumption in the SHM of a Gaussian velocity distribution is surprisingly accurate.…”

Section: The Shm: a Critical Discussionmentioning

confidence: 96%

“…Our data-driven work is complementary to the approach adopted in Refs. [58][59][60][61]. Here, simulated halos built up from successive merger events are examined to extract better motivated velocity distributions than the SHM ansatz.…”

Section: B Simulationsmentioning

confidence: 99%

Refinement of the standard halo model for dark matter searches in light of the Gaia Sausage

Evans

O’Hare

McCabe³

2019

Phys. Rev. D

187

165

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Predicting signals in experiments to directly detect dark matter (DM) requires a form for the local DM velocity distribution. Hitherto, the standard halo model (SHM), in which velocities are isotropic and follow a truncated Gaussian law, has performed this job. New data, however, suggest that a substantial fraction of our stellar halo lies in a strongly radially anisotropic population, the 'Gaia Sausage'. Inspired by this recent discovery, we introduce an updated DM halo model, the SHM ++ , which includes a 'Sausage' component, thus better describing the known features of our galaxy. The SHM ++ is a simple analytic model with five parameters: the circular speed, local escape speed and local DM density, which we update to be consistent with the latest data, and two new parameters: the anisotropy and the density of DM in the Sausage. The impact of the SHM ++ on signal models for WIMPs and axions is rather modest since the multiple changes and updates have competing effects. In particular, this means that the older exclusion limits derived for WIMPS are still reasonably accurate. However, changes do occur for directional detectors, which have sensitivity to the full three-dimensional velocity distribution.

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“…However, after the formation of the Milky Way, it develops a slight stochastic decoherence due to the gravitational clustering effect. The typical velocity dispersion of the ALP dark matter is σ v ∼ 10 −3 c [40], corresponding to a coherence length of λ coh ≈ λ a × 10 3 with λ a = 2π/m a being its Compton wavelength. In our work, we consider an ALP-neutrino interacting Lagrangian which preserves the shift symmetry as…”

Section: Introductionmentioning

confidence: 99%

Neutrinophilic axion-like dark matter

Huang

Nath

2018

Eur. Phys. J. C

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The axion-like particles (ALPs) are very good candidates of the cosmological dark matter, which can exist in many extensions of the standard model (SM). The mass range of the ALPs as the dark matter can extend from a sub-eV scale to almost 10 −22 eV. On the other hand, the neutrinos are found to be massive and the SM must be extended to explain the sub-eV neutrino masses. It becomes very interesting to consider an exclusive coupling between these two low scale frontiers that are both beyond the SM. The propagation of neutrinos inside the Milky Way would undergo the coherent forward scattering effect with the ALP background, and the neutrino oscillation behavior can be modified by the ALP-induced potential. Assuming a derivative coupling between the ALP and the three generations of active neutrinos, possible impacts on the neutrino oscillation experiments have been explored in this paper. In particular, we have numerically studied the sensitivity of the Deep Underground Neutrino Experiment (DUNE). The astrophysical consequences of such coupling have also been investigated systematically.

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A New Signal Model for Axion Cavity Searches from N-body Simulations

Cited by 33 publications

References 47 publications

Dark matter hurricane: Measuring the S1 stream with dark matter detectors

Dark matter hurricane: Measuring the S1 stream with dark matter detectors

Refinement of the standard halo model for dark matter searches in light of the Gaia Sausage

Neutrinophilic axion-like dark matter

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