Assessing alternatives for directional detection of a halo of weakly interacting massive particles

Craig J. Copi, Lawrence Krauss, David Simmons-Duffin, Steven R. Stroiney

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The future of direct terrestrial WIMP detection lies on two fronts: new, much larger low background detectors sensitive to energy deposition, and detectors with directional sensitivity. The former can explore a large range of WIMP parameter space using well-tested technology while the latter may be necessary if one is to disentangle particle physics parameters from astrophysical halo parameters. Because directional detectors will be quite difficult to construct it is worthwhile exploring in advance generally which experimental features will yield the greatest benefits at the lowest costs. We examine the sensitivity of directional detectors with varying angular tracking resolution with and without the ability to distinguish forward versus backward recoils, and compare these to the sensitivity of a detector where the track is projected onto a two-dimensional plane. The latter detector regardless of where it is placed on the Earth, can be oriented to produce a significantly better discrimination signal than a 3D detector without this capability, and with sensitivity within a factor of 2 of a full 3D tracking detector. Required event rates to distinguish signals from backgrounds for a simple isothermal halo range from the low teens in the best case to many thousands in the worst.

Original languageEnglish (US)
Article number023514
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume75
Issue number2
DOIs
StatePublished - 2007
Externally publishedYes

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weakly interacting massive particles
halos
Detector
Alternatives
detectors
sensitivity
Particle Physics
Range of data
Discrimination
discrimination
Parameter Space
astrophysics
physics
Necessary
Energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics
  • Mathematical Physics

Cite this

Assessing alternatives for directional detection of a halo of weakly interacting massive particles. / Copi, Craig J.; Krauss, Lawrence; Simmons-Duffin, David; Stroiney, Steven R.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 75, No. 2, 023514, 2007.

Research output: Contribution to journalArticle

Copi, Craig J. ; Krauss, Lawrence ; Simmons-Duffin, David ; Stroiney, Steven R. / Assessing alternatives for directional detection of a halo of weakly interacting massive particles. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2007 ; Vol. 75, No. 2.
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