Directional sensitivity, WIMP detection, and the galactic halo

Craig J. Copi; Junseong Heo; Lawrence M. Krauss

doi:10.1016/S0370-2693(99)00830-8

Directional sensitivity, WIMP detection, and the galactic halo

Craig J. Copi, Junseong Heo, Lawrence M. Krauss

Research output: Contribution to journal › Article › peer-review

106 Scopus citations

Abstract

Distinguishing the signals due to scattering of WIMP dark matter off of nuclear targets from those due to background noise is a major challenge. The Earth's motion relative to the galactic halo should produce halo-dependent seasonal modulation in the event rate, but it also should produce an angular signal that is both far stronger and less ambiguous. Distinct patterns in the recoil spectrum can reflect the details of the galactic halo. We derive a new formalism to calculate angular event rates, and present the predicted angular signal for a variety of halo models and calculate the number of events needed to distinguish a dark matter signal from an isotropic background.

Original language	English (US)
Pages (from-to)	43-48
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	461
Issue number	1-2
DOIs	https://doi.org/10.1016/S0370-2693(99)00830-8
State	Published - 1999
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/S0370-2693(99)00830-8

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title = "Directional sensitivity, WIMP detection, and the galactic halo",

abstract = "Distinguishing the signals due to scattering of WIMP dark matter off of nuclear targets from those due to background noise is a major challenge. The Earth's motion relative to the galactic halo should produce halo-dependent seasonal modulation in the event rate, but it also should produce an angular signal that is both far stronger and less ambiguous. Distinct patterns in the recoil spectrum can reflect the details of the galactic halo. We derive a new formalism to calculate angular event rates, and present the predicted angular signal for a variety of halo models and calculate the number of events needed to distinguish a dark matter signal from an isotropic background.",

author = "Copi, {Craig J.} and Junseong Heo and Krauss, {Lawrence M.}",

note = "Funding Information: This work was supported by the DOE. ",

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T1 - Directional sensitivity, WIMP detection, and the galactic halo

AU - Copi, Craig J.

AU - Heo, Junseong

AU - Krauss, Lawrence M.

N1 - Funding Information: This work was supported by the DOE.

PY - 1999

Y1 - 1999

N2 - Distinguishing the signals due to scattering of WIMP dark matter off of nuclear targets from those due to background noise is a major challenge. The Earth's motion relative to the galactic halo should produce halo-dependent seasonal modulation in the event rate, but it also should produce an angular signal that is both far stronger and less ambiguous. Distinct patterns in the recoil spectrum can reflect the details of the galactic halo. We derive a new formalism to calculate angular event rates, and present the predicted angular signal for a variety of halo models and calculate the number of events needed to distinguish a dark matter signal from an isotropic background.

AB - Distinguishing the signals due to scattering of WIMP dark matter off of nuclear targets from those due to background noise is a major challenge. The Earth's motion relative to the galactic halo should produce halo-dependent seasonal modulation in the event rate, but it also should produce an angular signal that is both far stronger and less ambiguous. Distinct patterns in the recoil spectrum can reflect the details of the galactic halo. We derive a new formalism to calculate angular event rates, and present the predicted angular signal for a variety of halo models and calculate the number of events needed to distinguish a dark matter signal from an isotropic background.

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JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1-2

ER -

Directional sensitivity, WIMP detection, and the galactic halo

Abstract

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