Shielding of a direct detection experiment and implications for the DAMA annual modulation signal

Shielding of a direct detection experiment and implications for the DAMA annual modulation signal

Previous work has argued that, in the framework of plasma dark matter models, the DAMA annual modulation signal can be consistently explained with electron recoils. In the specific case of mirror dark matter, that explanation requires an effective low velocity cutoff, vc≳30,000km/s, for the halo mir...

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Main Author: R. Foot
Format: Article
Language:English
Published: Elsevier 2019-02-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269318310074
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spelling doaj-2b24b6a5dc104653a16feb752461472d2020-11-25T02:11:56ZengElsevierPhysics Letters B0370-26932019-02-01789592597Shielding of a direct detection experiment and implications for the DAMA annual modulation signalR. Foot0ARC Centre of Excellence for Particle Physics at the Terascale, School of Physics, The University of Sydney, NSW 2006, Australia; ARC Centre of Excellence for Particle Physics at the Terascale, School of Physics, The University of Melbourne, VIC 3010, Australia; Correspondence to: ARC Centre of Excellence for Particle Physics at the Terascale, School of Physics, The University of Melbourne, VIC 3010, Australia.Previous work has argued that, in the framework of plasma dark matter models, the DAMA annual modulation signal can be consistently explained with electron recoils. In the specific case of mirror dark matter, that explanation requires an effective low velocity cutoff, vc≳30,000km/s, for the halo mirror electron distribution at the detector. We show here that this cutoff can result from collisional shielding of the detector from the halo wind due to Earth-bound dark matter. We also show that shielding effects can reconcile the kinetic mixing parameter value inferred from direct detection experiments with the value favoured from small scale structure considerations, ϵ≈2×10−10.http://www.sciencedirect.com/science/article/pii/S0370269318310074
collection DOAJ
language English
format Article
sources DOAJ
author R. Foot
spellingShingle R. Foot
Shielding of a direct detection experiment and implications for the DAMA annual modulation signal
Physics Letters B
author_facet R. Foot
author_sort R. Foot
title Shielding of a direct detection experiment and implications for the DAMA annual modulation signal
title_short Shielding of a direct detection experiment and implications for the DAMA annual modulation signal
title_full Shielding of a direct detection experiment and implications for the DAMA annual modulation signal
title_fullStr Shielding of a direct detection experiment and implications for the DAMA annual modulation signal
title_full_unstemmed Shielding of a direct detection experiment and implications for the DAMA annual modulation signal
title_sort shielding of a direct detection experiment and implications for the dama annual modulation signal
publisher Elsevier
series Physics Letters B
issn 0370-2693
publishDate 2019-02-01
description Previous work has argued that, in the framework of plasma dark matter models, the DAMA annual modulation signal can be consistently explained with electron recoils. In the specific case of mirror dark matter, that explanation requires an effective low velocity cutoff, vc≳30,000km/s, for the halo mirror electron distribution at the detector. We show here that this cutoff can result from collisional shielding of the detector from the halo wind due to Earth-bound dark matter. We also show that shielding effects can reconcile the kinetic mixing parameter value inferred from direct detection experiments with the value favoured from small scale structure considerations, ϵ≈2×10−10.
url http://www.sciencedirect.com/science/article/pii/S0370269318310074
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