Paper

Dark Matter Results from 225 Live Days of XENON100 Data

XENON100 Collaboration, Thers, D, Vitells, O, Meng, Y, Weber, M, Aprile, E, Oberlack, U, Arisaka, K, Melgarejo Fernandez, A J, Undagoitia, T Marrodan, Lamblin, J, Landsman, H, Lim, K E, Cardoso, J M R, Rosendahl, S, Persiani, R, Lopes, J A M, Hampel, W, Behrens, A, Bokeloh, K, Contreras, H, Selvi, M, Bauermeister, B, Colijn, A P, Alfonsi, M, Decowski, M P, Fattori, S, Balan, C, Duchovni, E, Orrigo, S E A, Shagin, P, Lindner, M, Goetzke, L W, Kish, A, Garbini, M, Cline, D, Gross, E, Molinario, A, Weinheimer, C, Cussonneau, J P, K -L Giboni, Brown, E, W -T Chen, Choi, B, Pantic, E, Lung, K, Scovell, P R, Massoli, F V, Gao, F, Baudis, L, Ghag, C, Wang, H, L Scotto Lavina, Grignon, C, Kaether, F, Fulgione, W, Levy, C, J M F dos Santos, Lindemann, S, Ferella, A D, Sartorelli, G, M Le Calloch, Lin, Q, Nativ, E, Simgen, H, Schreiner, J, Bruno, G, K Ni, Arneodo, F, Budnik, R, Kettling, H, Lang, R F, Schumann, M, Teymourian, A, Beltrame, P, Plante, G, Rizzo, A, Priel, N

2013

Overview

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.

• Publisher: Cornell University Library, arXiv.org
• Subject: Confidence intervals / Dark matter / Elastic limit / Elastic scattering / Recoil / Scattering cross sections / Weakly interacting massive particles