Dark Matter Spin-Dependent Limits for WIMP Interactions on 19-F by PICASSO
Abstract
The PICASSO experiment at SNOLAB reports new results for spin-dependent WIMP interactions on F using the superheated droplet technique. A new generation of detectors and new features which enable background discrimination via the rejection of non-particle induced events are described. First results are presented for a subset of two detectors with target masses of F of 65 g and 69 g respectively and a total exposure of 13.75 0.48 kgd. No dark matter signal was found and for WIMP masses around 24 GeV/c new limits have been obtained on the spin-dependent cross section on F of = 13.9 pb (90% C.L.) which can be converted into cross section limits on protons and neutrons of = 0.16 pb and = 2.60 pb respectively (90% C.L). The obtained limits on protons restrict recent interpretations of the DAMA/LIBRA annual modulations in terms of spin-dependent interactions.
Keywords
Cite
@article{arxiv.0907.0307,
title = {Dark Matter Spin-Dependent Limits for WIMP Interactions on 19-F by PICASSO},
author = {S. Archambault and F. Aubin and M. Auger and E. Behnke and B. Beltran and K. Clark and X. Dai and A. Davour and J. Farine and R. Faust and M. -H. Genest and G. Giroux and R. Gornea and C. Krauss and S. Kumaratunga and I. Lawson and C. Leroy and L. Lessard and C. Levy and I. Levine and R. MacDonald and J. -P. Martin and P. Nadeau and A. Noble and M. -C. Piro and S. Pospisil and T. Shepherd and N. Starinski and I. Stekl and C. Storey and U. Wichoski and V. Zacek},
journal= {arXiv preprint arXiv:0907.0307},
year = {2009}
}
Comments
Revised version, accepted for publication in Phys. Lett. B, 20 pages, 7 figures