The PICASSO Collaboration, S. Archambault, E. Behnke, P. Bhattacharjee, S. Bhattacharya, X. Dai, M. Das, A. Davour, F. Debris, N. Dhungana, J. Farine, S. Gagnebin, G. Giroux, E. Grace, C. M. Jackson, A. Kamaha, C. Krauss, S. Kumaratunga, M. Lafrenière, M. Laurin, I. Lawson, L. Lessard, I. Levine, C. Levy, R. P. MacDonald, D. Marlisov, J. -P. Martin, P. Mitra, A. J. Noble, M. -C. Piro, R. Podviyanuk, S. Pospisil, S. Saha, O. Scallon, S. Seth, N. Starinski, I. Stekl, U. Wichoski, T. Xie, V. Zacek
Recent results from the PICASSO dark matter search experiment at SNOLAB are
reported. These results were obtained using a subset of 10 detectors with a
total target mass of 0.72 kg of 19F and an exposure of 114 kgd. The low
backgrounds in PICASSO allow recoil energy thresholds as low as 1.7 keV to be
obtained which results in an increased sensitivity to interactions from Weakly
Interacting Massive Particles (WIMPs) with masses below 10 GeV/c^2. No dark
matter signal was found. Best exclusion limits in the spin dependent sector
were obtained for WIMP masses of 20 GeV/c^2 with a cross section on protons of
sigma_p^SD = 0.032 pb (90% C.L.). In the spin independent sector close to the
low mass region of 7 GeV/c2 favoured by CoGeNT and DAMA/LIBRA, cross sections
larger than sigma_p^SI = 1.41x10^-4 pb (90% C.L.) are excluded.
View original:
http://arxiv.org/abs/1202.1240
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