6-8 April 2009
University of Oxford
Europe/London timezone

Results from the first science run of ZEPLIN-III

7 Apr 2009, 12:00
15m
Dennis Sciama Lecture Theatre (University of Oxford)

Dennis Sciama Lecture Theatre

University of Oxford

Speaker

Blair Edwards (STFC Rutherford Appleton Laboratory)

Description

We present the results from the first science run of the ZEPLIN-III WIMP dark matter search. ZEPLIN-III utilises two-phase xenon, measuring both scintillation and ionisation produced by interactions in the liquid to differentiate between the nuclear recoils expected from WIMPs and the electron recoil background signals down to ∼10keV nuclear recoil energy. The higher-field operation of the instrument provides enhanced discrimination over previous two-phase xenon experiments. The first science run of ZEPLIN-III at the Palmer Underground Laboratory (Boulby mine, UK), acquired 847 kg.days of background data, with a final fiducial exposure of 266 kg.days, placing a 90% confidence upper limit on the WIMP-nucleon spin-independent scattering cross-section with a minimum at 7.7E-08 pb at a WIMP mass of 55 GeV/c2.

Primary author

Blair Edwards (STFC Rutherford Appleton Laboratory)

Presentation Materials