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Setting Limits on Supersymmetry Using Simplified Models
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Search for low-mass weakly interacting massive particles with SuperCDMS.

R Agnese1, A J Anderson2, M Asai3

  • 1Department of Physics, University of Florida, Gainesville, Florida 32611, USA.

Physical Review Letters
|July 5, 2014
PubMed
Summary
This summary is machine-generated.

This study presents the first search for weakly interacting massive particles (WIMPs) using SuperCDMS, setting new limits on WIMP-nucleon cross sections for low-mass WIMPs.

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Area of Science:

  • Particle Physics
  • Cosmic Microwave Background
  • Astrophysics

Background:

  • Weakly Interacting Massive Particles (WIMPs) are a leading candidate for dark matter.
  • Previous experiments have searched for WIMPs, but parameter space remains largely unexplored.
  • The Super Cryogenic Dark Matter Search (SuperCDMS) utilizes advanced background rejection techniques.

Purpose of the Study:

  • To conduct a first-ever search for WIMPs using SuperCDMS's background rejection capabilities.
  • To probe WIMP-nucleon scattering for WIMP masses below 30 GeV/c^2.
  • To set upper limits on the spin-independent WIMP-nucleon cross section.

Main Methods:

  • Analysis of 577 kg days of exposure data from SuperCDMS.
  • Utilizing SuperCDMS's background rejection capabilities to isolate potential WIMP signals.
  • Employing a blinded analysis approach with the signal region initially hidden.

Main Results:

  • Eleven events were observed in the signal region after unblinding.
  • An upper limit on the spin-independent WIMP-nucleon cross section was set at 1.2×10^-42 cm^2 at 8 GeV/c^2.
  • The results probe new parameter space for WIMP masses below 6 GeV/c^2.

Conclusions:

  • The SuperCDMS experiment provides the first WIMP search results utilizing its advanced background rejection.
  • The established limits are in tension with some WIMP interpretations from recent experiments.
  • This study opens new avenues for WIMP detection and dark matter research.