Optimizing EDELWEISS detectors for low-mass WIMP searches

EDELWEISS Collaboration

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The physics potential of EDELWEISS detectors for the search of low-mass weakly interacting massive particles (WIMPs) is studied. Using a data-driven background model, projected exclusion limits are computed using frequentist and multivariate analysis approaches, namely, profile likelihood and boosted decision tree. Both current and achievable experimental performances are considered. The optimal strategy for detector optimization depends critically on whether the emphasis is put on WIMP masses below or above ∼5 GeV/c2. The projected sensitivity for the next phase of the EDELWEISS-III experiment at the Modane Underground Laboratory (LSM) for low-mass WIMP search is presented. By 2018 an upper limit on the spin-independent WIMP-nucleon cross section of σSI=7×10-42 cm2 is expected for a WIMP mass in the range 2-5 GeV/c2. The requirements for a future hundred-kilogram-scale experiment designed to reach the bounds imposed by the coherent scattering of solar neutrinos are also described. By improving the ionization resolution down to 50 eVee, we show that such an experiment installed in an even lower background environment (e.g., at SNOLAB) together with an exposure of 1000 kg·yr, should allow us to observe about 80 B8 neutrino events after discrimination.

Original languageEnglish
Article number022003
JournalPhysical Review D
Volume97
Issue number2
DOIs
Publication statusPublished - Jan 18 2018

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weakly interacting massive particles
detectors
particle mass
coherent scattering
International System of Units
solar neutrinos
exclusion
discrimination
neutrinos
ionization
requirements
physics
optimization
sensitivity
cross sections
profiles

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Optimizing EDELWEISS detectors for low-mass WIMP searches. / EDELWEISS Collaboration.

In: Physical Review D, Vol. 97, No. 2, 022003, 18.01.2018.

Research output: Contribution to journalArticle

EDELWEISS Collaboration. / Optimizing EDELWEISS detectors for low-mass WIMP searches. In: Physical Review D. 2018 ; Vol. 97, No. 2.
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abstract = "The physics potential of EDELWEISS detectors for the search of low-mass weakly interacting massive particles (WIMPs) is studied. Using a data-driven background model, projected exclusion limits are computed using frequentist and multivariate analysis approaches, namely, profile likelihood and boosted decision tree. Both current and achievable experimental performances are considered. The optimal strategy for detector optimization depends critically on whether the emphasis is put on WIMP masses below or above ∼5 GeV/c2. The projected sensitivity for the next phase of the EDELWEISS-III experiment at the Modane Underground Laboratory (LSM) for low-mass WIMP search is presented. By 2018 an upper limit on the spin-independent WIMP-nucleon cross section of σSI=7×10-42 cm2 is expected for a WIMP mass in the range 2-5 GeV/c2. The requirements for a future hundred-kilogram-scale experiment designed to reach the bounds imposed by the coherent scattering of solar neutrinos are also described. By improving the ionization resolution down to 50 eVee, we show that such an experiment installed in an even lower background environment (e.g., at SNOLAB) together with an exposure of 1000 kg·yr, should allow us to observe about 80 B8 neutrino events after discrimination.",
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