COSMOVIA - Virtual Institute of Astroparticle Physics /IN THE NEWS /DARK MATTER RESULTS FROM 100 LIVE DAYS OF XENON100 DATA

Credits

XENON100 Collaboration: E. Aprile, K. Arisaka, F. Arneodo, A. Askin,
L. Baudis, A. Behrens, K. Bokeloh, E. Brown, T. Bruch, G. Bruno, J. M. R.
Cardoso, W.-T. Chen, B. Choi, D. Cline, E. Duchovni, S. Fattori, A. D.
Ferella, F. Gao, K.-L. Giboni, E. Gross, A. Kish, C. W. Lam, J. Lamblin, R.
F. Lang, C. Levy, K. E. Lim, Q. Lin, S. Lindemann, M. Lindner, J. A. M.
Lopes, K. Lung, T. Marrodan Undagoitia, Y. Mei, A. J. Melgarejo Fernandez, K.
Ni, U. Oberlack, S. E. A. Orrigo, E. Pantic, R. Persiani, G. Plante, A. C. C.
Ribeiro, R. Santorelli, J. M. F. dos Santos, G. Sartorelli, M. Schumann, M.
Selvi, P. Shagin, H. Simgen, A. Teymourian, D. Thers, O. Vitells, H. Wang, M.
Weber, and C. Weinheimer

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Dark Matter Results from 100 Live Days of XENON100 Data.

13 april 2011

We present results from the direct search for dark matter with the XENON100 detector, installed underground...

We present results from the direct search for dark matter with the XENON100
detector, installed underground at the Laboratori Nazionali del Gran Sasso of
INFN, Italy. XENON100 is a two-phase time projection chamber with a 62 kg
liquid xenon target. Interaction vertex reconstruction in three dimensions with
millimeter precision allows to select only the innermost 48 kg as ultra-low
background fiducial target. In 100.9 live days of data, acquired between
January and June 2010, no evidence for dark matter is found. Three candidate
events were observed in a pre-defined signal region with an expected background
of 1.8 ± 0.6 events. This leads to the most stringent limit on dark matter
interactions today, excluding spin-independent elastic WIMP-nucleon scattering
cross-sections above 7.0x10-45 cm2 for a WIMP mass of 50 GeV/c2 at 90%
confidence level.
\\ ( http://arxiv.org/abs/1104.2549 , 1453kb)