First Results of the Phase II SIMPLE Dark Matter Search
astro-ph.CO
/ Authors
M. Felizardo, T. Morlat, A. C. Fernandes, TA Girard, J. G. Marques, A. R. Ramos, M. Auguste, D. Boyer, A. Cavaillou, C. Sudre
and 4 more authors
/ 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.