The Search for the Origin of Dark Matter David Cline Astrophysics - - PowerPoint PPT Presentation

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Dec 16, 2023 307 likes •502 views

The Search for the Origin of Dark Matter David Cline Astrophysics Division University of California, Los Angeles, CA 90095 USA dcline @ physics.ucla.edu Topics A brief history of dark matter 1. The Initial Observation of Missing

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The Search for the Origin of Dark Matter

David Cline Astrophysics Division University of California, Los Angeles, CA 90095 USA dcline @ physics.ucla.edu Topics A brief history of dark matter

1. “The Initial Observation of ‘Missing Matter” Effects (1933 – 1936)”
2. The Current Evidence for Dark Matter as Non-Baryonic Matter
3. Strategy to Search for Dark Matter Particles—Direct and Indirect Detector
4. Progress in the Direct Detection Searches
5. Possible discovery in the next few years
6. Summary

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Methods to Search for Dark Matter (WIMPS)

Direct: Scatter from atom recoil gives signal; rate goes like A2 Large Detector: CDMSII, Super CDMS, Edelweiss, CRESST, ZEPLIN, XENON, WARP, LUX Indirect: Detect products of WIMP interactions in the galaxy with characteristic properties γ, e+, , Detectors: GLAST, PAAMELA, AGILE, GAPS, AMS, ICECUBE, SUPER K, etc.

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CDMS Direct Detection

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Expected sensitivity – 5Towers

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XENON10, ZEPLIN II results

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Status and Prospects for the Search for WIMP Dark Matter

Current 2007 σ ~ 10-7 pb limit [CDMS, XENON 10, ZEPLIN II] 2008 Expect ? σ ~ 10-8 pb limit [Same as 2007 and ZEPLIN II, WARP 140] 2008-2010 2008-2010 σ ~ 10-9 pb search [LUZ, Super CDMS, EURECA] Current theory estimate: σ ~ 10-8 – 10-9 pb for signal

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