WIMP identification through a combined measurement of axial and scalar couplings

Abstract

We study the prospects for detecting Weakly Interacting Massive Particles (WIMPs), in a number of phenomenological scenarios, with a detector composed of a target simultaneously sensitive to both spin-dependent and spin-independent couplings, as is the case of COUPP (Chicagoland Observatory for Underground Particle Physics). First, we show that sensitivity to both couplings optimizes chances of initial WIMP detection. Second, we demonstrate that in case of detection, comparison of the signal on two complementary targets, such as in COUPP CF3I and C4F10 bubble chambers, allows a significantly more precise determination of the dark matter axial and scalar couplings. This strategy would provide crucial information on the nature of the WIMPs, and possibly allow discrimination between neutralino and Kaluza-Klein dark matter.

arXiv comment4 pages 2 figures, uses revtex. References added and Fig.2 improved. To appear in PRL

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• Identification of Dark Matter particles with LHC and direct detection data
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• Fermion WIMPless Dark Matter at DeepCore and IceCube
• On the spin-dependent sensitivity of XENON100
• Multi-Dimensional Effective Field Theory Analysis for Direct Detection of Dark Matter
• Constraining Dark Matter Properties with Gamma-Rays from the Galactic Center with Fermi-LAT
• Enhanced Line Signals from Annihilating Kaluza-Klein Dark Matter
• Determining Ratios of WIMP-Nucleon Cross Sections from Direct Dark Matter Detection Data
• Opening the energy window on direct dark matter detection
• Surrogate Models for Direct Dark Matter Detection
• Constraining the Milky Way Dark Matter Density Profile with Gamma-Rays with Fermi-LAT
• A scheme for the extraction of WIMP-nucleon scattering cross sections from total event rates
• Fabrication and Response of High Concentration SIMPLE Superheated Droplet Detectors with Different Liquids
• On the importance of direct detection combined limits for spin independent and spin dependent dark matter interactions
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• Effects of Residue Background Events in Direct Dark Matter Detection Experiments on the Determinations of Ratios of WIMP-Nucleon Cross Sections