Detectability of Light Dark Matter with Superfluid Helium

Schutz, Katelin; Zurek, Kathryn M.

doi:10.1103/physrevlett.117.121302

Cited by 176 publications

(205 citation statements)

References 42 publications

(56 reference statements)

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“…With their detector these authors probably have a way to circumvent the fact that a small amount of energy will be deposited, if they manage to accumulate a large number of loosely bound electrons in their targets so that the obtained rates are sufficient. More recently it is claimed that even smaller energies in meV can be detected in the case of Liquid Helium [54]. The expected event rates and the total energy deposited in such essentially bolometer type detectors are currently being estimated more precisely and they will appear elsewhere.…”

Section: Discussionmentioning

confidence: 99%

Light WIMP Searches Involving Electron Scattering

Vergados

Moustakidis

Cheung

et al. 2018

Advances in High Energy Physics

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In the present work we examine the possibility of detecting electrons in light dark matter searches. These detectors are considered to be the most appropriate for detecting dark matter particles with a mass in the MeV region. We analyze theoretically some key issues involved in such detection. More specifically we consider a particle model involving WIMPs interacting with fermions via -exchange. We find that for WIMPs with mass in the electron mass range the cross section for WIMP-atomic electron scattering is affected by the electron binding. For WIMPs more than 20 times heavier than the electron, the binding affects the kinematics very little. As a result, many electrons can be ejected with energy which increases linearly with the WIMP mass, but the cross section is somewhat reduced depending on the bound state wave function employed. On the other hand for lighter WIMPs, the effect of binding is dramatic. More specifically at most 10 electrons, namely, those with binding energy below 10 eV, become available even in the case of WIMPs with a mass as large as 20 times the electron mass. Even fewer electrons contribute if the WIMPs are lighter. The cross section is, however, substantially enhanced by the Fermi function corrections, which become more important at low energies of the outgoing electrons. Thus events of 0.5-2.5 per kg-y become possible.

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Section: Discussionmentioning

confidence: 99%

Light WIMP Searches Involving Electron Scattering

Vergados

Moustakidis

Cheung

et al. 2018

Advances in High Energy Physics

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“…These numbers should be compared with other very recent proposals to directly measure DM in this mass range, see, e.g., Refs. [51][52][53][54][55][56][57][58][59].…”

Section: Solar Neutrinos and Dark Mattermentioning

confidence: 99%

Detection prospects for the Cosmic Neutrino Background using laser interferometers

Domcke

Spinrath

2017

J. Cosmol. Astropart. Phys.

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The cosmic neutrino background is a key prediction of Big Bang cosmology which has not been observed yet. The movement of the earth through this neutrino bath creates a force on a pendulum, as if it were exposed to a cosmic wind. We revise here estimates for the resulting pendulum acceleration and compare it to the theoretical sensitivity of an experimental setup where the pendulum position is measured using current laser interferometer technology as employed in gravitational wave detectors. We discuss how a significant improvement of this setup can be envisaged in a micro gravity environment. The proposed setup could also function as a dark matter detector in the sub-MeV range, which currently eludes direct detection constraints.

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“…We will also apply our results to the DAMIC bounds discussed in [12] derived from an engineering run of DAMIC [14]. Additional possible methods for detecting sub-GeV DM include superconductors [15,16], superfluid helium [17,18], as well as a search tactic employing conventional DM detectors wherein a detectable photon is emitted from the scattered nucleus [19].…”

Section: Introductionmentioning

confidence: 95%

Terrestrial effects on dark matter-electron scattering experiments

2017

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A well-studied possibility is that dark matter may reside in a sector secluded from the Standard Model, except for the so-called photon portal: kinetic mixing between the ordinary and dark photons. Such interactions can be probed at dark matter direct detection experiments, and new experimental techniques involving detection of dark matter-electron scattering offer new sensitivity to sub-GeV dark matter. Typically however it is implicitly assumed that the dark matter is not altered as it traverses the Earth to arrive at the detector. In this paper we study in detail the effects of terrestrial stopping on dark photon models of dark matter, and find that they significantly reduce the sensitivity of XENON10 and DAMIC. In particular we find that XENON10 only excludes masses in the range (5-3000) MeV while DAMIC only probes (20-50) MeV. Their corresponding cross section sensitivity is reduced to a window of cross sections between (5 × 10 −38 − 10 −30 ) cm 2 for XENON10 and a small window around ∼ 10 −31 cm 2 for DAMIC. We also examine implications for a future DAMIC run.

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Detectability of Light Dark Matter with Superfluid Helium

Cited by 176 publications

References 42 publications

Light WIMP Searches Involving Electron Scattering

Light WIMP Searches Involving Electron Scattering

Detection prospects for the Cosmic Neutrino Background using laser interferometers

Terrestrial effects on dark matter-electron scattering experiments

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