Improved Limits on Spin-Dependent WIMP-Proton Interactions from a Two Liter CF3I Bubble Chamber

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dc.contributor.authorBehnke, Ed
dc.contributor.authorBehnke, J.
dc.contributor.authorHinnefeld, Jerry
dc.contributor.authorLevine, Ilan
dc.contributor.authorShepherd, T.
dc.date.accessioned2023-02-15T19:54:17Z
dc.date.available2023-02-15T19:54:17Z
dc.date.issued2011-03
dc.description.abstractData from the operation of a bubble chamber filled with 3.5 kg of CF3I in a shallow underground site are reported. An analysis of ultrasound signals accompanying bubble nucleations confirms that alpha decays generate a significantly louder acoustic emission than single nuclear recoils, leading to an efficient background discrimination. Three dark matter candidate events were observed during an effective exposure of 28.1 kg-day, consistent with a neutron background. This observation provides strong direct detection constraints on WIMP-proton spin-dependent scattering for WIMP masses > 20 GeV/c2.
dc.format.extent6 pages
dc.format.mimetypePDF
dc.identifier.urihttps://hdl.handle.net/2022/28667
dc.language.isoen
dc.publisherAmerican Physical Society
dc.rightsThis work may be protected by copyright unless otherwise stated.
dc.subject.lcshDark matter (Astronomy)
dc.subject.lcshParticles (Nuclear physics)
dc.titleImproved Limits on Spin-Dependent WIMP-Proton Interactions from a Two Liter CF3I Bubble Chamber
dc.typeArticle

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