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29 March 2024
 
  » arxiv » 0907.0307

 Article overview


Dark Matter Spin-Dependent Limits for WIMP Interactions on 19-F by PICASSO
S. Archambault ; F. Aubin ; M. Auger ; E. Behnke ; B. Beltran ; K. Clark ; X. Dai ; A. Davour ; J. Farine ; R. Faust ; M.-H. Genest ; G. Giroux ; R. Gornea ; C. Krauss ; S. Kumaratunga ; I. Lawson ; C. Leroy ; L. Lessard ; C. Levy ; I. Levine ; R. MacDonald ; J.-P. Martin ; P. Nadeau ; A. Noble ; M.-C. Piro ; S. Pospisil ; T. Shepherd ; N. Starinski ; I. Stekl ; C. Storey ; U. Wichoski ; V. Zacek ;
Date 2 Jul 2009
AbstractThe PICASSO experiment at SNOLAB reports new results for spin-dependent WIMP interactions on $^{19}$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 $^{19}$F of 65 g and 69 g respectively and a total exposure of 13.75 $pm$ 0.48 kgd. No dark matter signal was found and for WIMP masses around 24 GeV/c$^2$ new limits have been obtained on the spin-dependent cross section on $^{19}$F of $sigma_F$ = 13.9 pb (90% C.L.) which can be converted into cross section limits on protons and neutrons of $sigma_p$ = 0.16 pb and $sigma_n$ = 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.
Source arXiv, 0907.0307
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