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Dark Matter Results from 225 Live Days of XENON100 Data

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arxiv 1207.5988 v2 pith:5DSXZCCE submitted 2012-07-25 astro-ph.CO hep-exhep-phphysics.ins-det

classification astro-ph.COhep-exhep-phphysics.ins-det
keywords darkenergyeventsmattertimesxenon100analysisbackground
verification ladder T0 review T1 audit T2 compute T3 formal

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We report on a search for particle dark matter with the XENON100 experiment, operated at the Laboratori Nazionali del Gran Sasso (LNGS) for 13 months during 2011 and 2012. XENON100 features an ultra-low electromagnetic background of (5.3 \pm 0.6) \times 10^-3 events (kg day keVee)^-1 in the energy region of interest. A blind analysis of 224.6 live days \times 34 kg exposure has yielded no evidence for dark matter interactions. The two candidate events observed in the pre-defined nuclear recoil energy range of 6.6-30.5 keVnr are consistent with the background expectation of (1.0 \pm 0.2) events. A Profile Likelihood analysis using a 6.6-43.3 keVnr energy range sets the most stringent limit on the spin-independent elastic WIMP-nucleon scattering cross section for WIMP masses above 8 GeV/c^2, with a minimum of 2 \times 10^-45 cm^2 at 55 GeV/c^2 and 90% confidence level.

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Cited by 3 Pith papers

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