First Results of the Phase II SIMPLE Dark Matter Search

Abstract

We report results of a 14.1 kgd measurement with 15 superheated droplet detectors of total active mass 0.208 kg, comprising the first stage of a 30 kgd Phase II experiment. In combination with the results of the neutron-spin sensitive XENON10 experiment, these results yield a limit of |a_p| < 0.32 for M_W = 50 GeV/c2 on the spin-dependent sector of weakly interacting massive particle-nucleus interactions with a 50% reduction in the previously allowed region of the phase space formerly defined by XENON, KIMS and PICASSO. In the spin-independent sector, a limit of 2.3x10-5 pb at M_W = 45 GeV/c2 is obtained.

4 pages, 4 figures; PRL-accepted version with corrected SI contour (Fig. 4)

References in corpus (4)

• Results from the First Science Run of the ZEPLIN-III Dark Matter Search Experiment
• Improved Spin-Dependent WIMP Limits from a Bubble Chamber
• Discrimination of nuclear recoils from alpha particles with superheated liquids
• Compatibility of DAMA/LIBRA dark matter detection with other searches in light of new Galactic rotation velocity measurements

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• New Limits on Dark Matter from Super-Kamiokande
• The SIMPLE Phase II Dark Matter Search
• Direct Detection of Dark Matter Electromagnetic Dipole Moments
• New Insights into Particle Detection with Superheated Liquids
• Model Independent Direct Detection Analyses
• Neutrinos in IceCube/KM3NeT as probes of Dark Matter Substructures in Galaxy Clusters
• Closing in on mass-degenerate dark matter scenarios with antiprotons and direct detection
• Determining Ratios of WIMP-Nucleon Cross Sections from Direct Dark Matter Detection Data
• Comparing readout strategies to directly detect dark matter
• Determining the bubble nucleation efficiency of low-energy nuclear recoils in superheated C${}_3$F${}_8$ dark matter detectors
• Detection Prospects for Majorana Fermion WIMPless Dark Matter
• New limits on WIMP interactions from the SIMPLE dark matter search
• Measuring the cross section of the ${}^{15}$N($\alpha$,$\gamma$)${}^{19}$F reaction using a single-fluid bubble chamber
• Instrumentation, acquisition and analysis of the Phase II SIMPLE dark matter search signals