Improved Spin Dependent Limits from the PICASSO Dark Matter Search Experiment

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dc.creatorThe PICASSO Collaboration
dc.creatorBarnabe-Heider, M.
dc.creatorBehnke, E.
dc.creatorClark, K.
dc.creatorDi Marco, M.
dc.creatorDoane, P.
dc.creatorFeighery, W.
dc.creatorGenest, M. -H.
dc.creatorGornea, R.
dc.creatorGuenette, R.
dc.creatorKanagalingam, S.
dc.creatorKrauss, C. B.
dc.creatorLeroy, C.
dc.creatorLessard, L.
dc.creatorLevine, I.
dc.creatorMartin, J. -P.
dc.creatorMuthusi, C.
dc.creatorNoble, A. J.
dc.creatorNoulty, R.
dc.creatorWichoski, U.
dc.creatorZacek, V.
dc.date2005-02-15
dc.date2005-08-09
dc.date.accessioned2026-07-07T10:28:32Z
dc.date.available2026-07-07T10:28:32Z
dc.descriptionThe PICASSO experiment reports an improved limit for the existence of cold dark matter WIMPs interacting via spin-dependent interactions with nuclei. The experiment is installed in the Sudbury Neutrino Observatory at a depth of 2070 m. With superheated C4F10 droplets as the active material, and an exposure of 1.98+-0.19 kgd, no evidence for a WIMP signal was found. For a WIMP mass of 29 GeV/c2, limits on the spin-dependent cross section on protons of sigma_p = 1.31 pb and on neutrons of sigma_n = 21.5 pb have been obtained at 90% C.L. In both cases, some new parameter space in the region of WIMP masses below 20 GeV/c2 has now been ruled out. The results of these measurements are also presented in terms of limits on the effective WIMP-proton and neutron coupling strengths a_p and a_n.
dc.description24 pages, 6 figures; text expanded for clarity, new figure added. To be published in Phys. Lett. B
dc.identifierhttps://arxiv.org/abs/hep-ex/0502028
dc.identifierhttp://arxiv.org/abs/hep-ex/0502028
dc.identifierPhys.Lett.B624:186-194,2005
dc.identifierdoi:10.1016/j.physletb.2005.08.021
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/177476
dc.subjectHigh Energy Physics - Experiment
dc.titleImproved Spin Dependent Limits from the PICASSO Dark Matter Search Experiment
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