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Title: Dark matter directionality revisited with a high pressure xenon gas detector

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [1];  [2];  [3];  [3]
  1. Univ. of Kansas, Lawrence, KS (United States)
  2. Institute for Basic Science (IBS), Daejon (Korea)
  3. Fermi National Accelerator Laboratory, Batavia, IL (United States)

An observation of the anisotropy of dark matter interactions in a direction-sensitive detector would provide decisive evidence for the discovery of galactic dark matter. Directional information would also provide a crucial input to understanding its distribution in the local Universe. Most of the existing directional dark matter detectors utilize particle tracking methods in a low-pressure gas time projection chamber. These low pressure detectors require excessively large volumes in order to be competitive in the search for physics beyond the current limit. In order to avoid these volume limitations, we consider a novel proposal, which exploits a columnar recombination effect in a high-pressure gas time projection chamber. The ratio of scintillation to ionization signals observed in the detector carries the angular information of the particle interactions. In this paper, we investigate the sensitivity of a future directional detector focused on the proposed high-pressure Xenon gas time projection chamber. We study the prospect of detecting an anisotropy in the dark matter velocity distribution. We find that tens of events are needed to exclude an isotropic distribution of dark matter interactions at 95% confidence level in the most optimistic case with head-to-tail information. However, one needs at least 10-20 times more events without head-to-tail information for light dark matter below ~50 GeV. For an intermediate mass range, we find it challenging to observe an anisotropy of the dark matter distribution. Our results also show that the directional information significantly improves precision measurements of dark matter mass and the elastic scattering cross section for a heavy dark matter.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
FG02-12ER41809; SC0007863
OSTI ID:
1214552
Journal Information:
Journal of High Energy Physics (Online), Vol. 2015, Issue 7; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

References (38)

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  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 584, Issue 2-3 https://doi.org/10.1016/j.nima.2007.10.037
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A review on the discovery reach of Dark Matter directional detection journal December 2013
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Measurement of scintillation and ionization yield and scintillation pulse shape from nuclear recoils in liquid argon text January 2015
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Observation of the 'head-tail' effect in nuclear recoils of low-energy neutrons text January 2007
First measurement of the Head-Tail directional nuclear recoil signature at energies relevant to WIMP dark matter searches text January 2008
First underground results with NEWAGE-0.3a direction-sensitive dark matter detector text January 2010
Dependence of direct detection signals on the WIMP velocity distribution text January 2010
NEST: A Comprehensive Model for Scintillation Yield in Liquid Xenon text January 2011
Three-dimensional track reconstruction for directional Dark Matter detection text January 2012
Aberration features in directional dark matter detection text January 2012
Directional detection of galactic dark matter text January 2012
In situ measurement of the electron drift velocity for upcoming directional Dark Matter detectors text January 2013
A review on the discovery reach of Dark Matter directional detection text January 2013

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