Dark Matter Results from 225 Live Days of XENON100 Data
XENON100 Collaboration · Aprile, E. · Alfonsi, M. · Arisaka, K. · Arneodo, F. · Balan, C. · Baudis, L. · Bauermeister, B. · Behrens, A. · Beltrame, P. · Bokeloh, K. · Brown, E. · Bruno, G. · Budnik, R. · Cardoso, J. M. R. · Chen, W. -T. · Choi, B. · Cline, D. · Colijn, A. P. · Contreras, H. · Cussonneau, J. P. · Decowski, M. P. · Duchovni, E. · Fattori, S. · Ferella, A. D. · Fulgione, W. · Gao, F. · Garbini, M. · Ghag, C. · Giboni, K. -L. · Goetzke, L. W. · Grignon, C. · Gross, E. · Hampel, W. · Kaether, F. · Kettling, H. · Kish, A. · Lamblin, J. · Landsman, H. · Lang, R. F. · Calloch, M. Le · Levy, C. · Lim, K. E. · Lin, Q. · Lindemann, S. · Lindner, M. · Lopes, J. A. M. · Lung, K. · Undagoitia, T. Marrodan · Massoli, F. V. · Fernandez, A. J. Melgarejo · Meng, Y. · Molinario, A. · Nativ, E. · Ni, K. · Oberlack, U. · Orrigo, S. E. A. · Pantic, E. · Persiani, R. · Plante, G. · Priel, N. · Rizzo, A. · Rosendahl, S. · Santos, J. M. F. dos · Sartorelli, G. · Schreiner, J. · Schumann, M. · Lavina, L. Scotto · Scovell, P. R. · Selvi, M. · Shagin, P. · Simgen, H. · Teymourian, A. · Thers, D. · Vitells, O. · Wang, H. · Weber, M. · Weinheimer, C.
الأصل · EN
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.
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