Abstract
A WIMP-model-independent method is used to examine the existing evidence for low mass dark matter. Using XENON100's recent result of 224.6 live days × 34 kg exposure and PICASSO's result that was published in 2012, we have obtained constraints on the couplings |an| < 0.4 and |ap| < 0.3, corresponding to spin-dependent cross-sections of σn<2.5×10−38 cm and σp<1.4×10−38 cm2 for a WIMP mass of 10 GeV/c2. It is shown that the spin-independent isospin-violating dark matter model also fails to reconcile the recent result from XENON100 with the positive results from DAMA, CoGeNT and CDMS-II.
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