Aberration features in directional dark matter detection

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Publication Type pre-print
School or College College of Science
Department Physics
Creator Gondolo, Paolo
Other Author Bozorgnia, Nassim; Gelmini, Graciela B.
Title Aberration features in directional dark matter detection
Date 2012-01-01
Description The motion of the Earth around the Sun causes an annual change in the mag-nitude and direction of the arrival velocity of dark matter particles on Earth, in a way analogous to aberration of stellar light. In directional detectors, aberration of weakly interacting massive particles (WIMPs) modulates the pattern of nuclear recoil directions in a way that depends on the orbital velocity of the Earth and the local galactic distribution of WIMP velocities. Knowing the former, WIMP aberration can give information on the latter, besides being a curious way of confirming the revolution of the Earth and the ex-traterrestrial provenance of WIMPs. While observing the full aberration pattern requires extremely large exposures, we claim that the annual variation of the mean recoil direction or of the event counts over specific solid angles may be detectable with moderately large exposures. For example, integrated counts over Galactic hemispheres separated by planes perpendicular to Earth's orbit would modulate annually, resulting in Galactic Hemisphere Annual Modulations (GHAM) with amplitudes larger than the usual non-directional annual modulation.
Type Text
Publisher IOP Publishing
First Page 1
Last Page 10
Dissertation Institution University of Utah
Language eng
Bibliographic Citation Bhattacharya, S., & Adler, F. R. (2012). A time since recovery model with varying rates of loss of immunity. Bulletin of Mathematical Biology, 1-10.
Rights Management (c) 2012 IOP Publishing ; Reprinted from Aberration features in directional dark matter detection, 2012(8), no. 011.This is an author-created, un-copyedited version of an article accepted for publication in Journal of Cosmology and Astroparticle Physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher authenticated version is available online at doi:10.1088/1475-7516/2012/08/011.
Format Medium application/pdf
Format Extent 2,020,780 bytes
Identifier uspace,17762
ARK ark:/87278/s6ft94s6
Setname ir_uspace
Date Created 2012-11-16
Date Modified 2021-05-06
ID 708225
Reference URL https://collections.lib.utah.edu/ark:/87278/s6ft94s6
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