Physics – Medical Physics
Scientific paper
Apr 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apsp.conf..242k&link_type=abstract
ASTROPARTICLE, PARTICLE AND SPACE PHYSICS, DETECTORS AND MEDICAL PHYSICS APPLICATIONS. Proceedings of the 11th Conference. Held
Physics
Medical Physics
Scientific paper
PICASSO is a dark matter experiment based at SNOLAB. Sudbury (Ontario). It searches for spin dependent interactions of Weakly Interacting Massive Particles (WIMP) on 19F and uses superheated liquid C4F10 as its active detector component. PICASSO recently discovered that its signals contain information about the very nature of the primary event and therefore can be used to discriminate efficiently between WIMP signals, alpha particles and non-particle induced background sources. This paper will discuss this separation technique and present the current best limits on the WIMP-proton cross section in the spin dependent sector. With only two of the 32 detectors analyzed, a limit on the WIMP-proton cross section of σp = 0.16 pb (90% C.L.) has been obtained, restricting recent interpretations of the DAMA/LIBRA annual modulations.
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