Constraints on Low-Mass WIMP Interactions on 19F from PICASSO
Abstract
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.
Keywords
Cite
@article{arxiv.1202.1240,
title = {Constraints on Low-Mass WIMP Interactions on 19F from PICASSO},
author = {The PICASSO Collaboration and S. Archambault and E. Behnke and P. Bhattacharjee and S. Bhattacharya and X. Dai and M. Das and A. Davour and F. Debris and N. Dhungana and J. Farine and S. Gagnebin and G. Giroux and E. Grace and C. M. Jackson and A. Kamaha and C. Krauss and S. Kumaratunga and M. Lafrenière and M. Laurin and I. Lawson and L. Lessard and I. Levine and C. Levy and R. P. MacDonald and D. Marlisov and J. -P. Martin and P. Mitra and A. J. Noble and M. -C. Piro and R. Podviyanuk and S. Pospisil and S. Saha and O. Scallon and S. Seth and N. Starinski and I. Stekl and U. Wichoski and T. Xie and V. Zacek},
journal= {arXiv preprint arXiv:1202.1240},
year = {2012}
}
Comments
23 pages, 7 figures, to be published in Phys. Lett. B