2012/07/31 by XENON100 Collaboration, E. Aprile, M. Alfonsi +75 · 1 citation
Physics and Astronomy · #astro-ph.CO #hep-ex #hep-ph #physics.ins-det
paper · pdf · doi:10.1103/physrevlett.109.181301
published as Phys. Rev. Lett. 109, 181301 (2012) · 6 pages, 5 figures. Matches version accepted by PRL. Includes limits up to 10 TeV/c^2, published as supplementary material: http://prl.aps.org/supplemental/PRL/v109/i18/e181301 Please cite high mass limits as "Phys. Rev. Lett. 109, 181301 (2012), online supplementary material."
arxiv created 2013/03/20 · arxiv updated 2013/03/21
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 ± 0.6) × 10-3 events (kg day keVee)-1 in the energy region of interest. A blind analysis of 224.6 live days × 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 ± 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/c2, with a minimum of 2 × 10-45 cm2 at 55 GeV/c2 and 90% confidence level.