COSMOVIA - Virtual Institute of Astroparticle Physics /IN THE NEWS /DARK MATTER RESULTS FROM 225 LIVE DAYS OF XENON100 DATA

Credits

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

> link

Share this article

Dark Matter Results from 225 Live Days of XENON100 Data

July, 25, 2012

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...

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\pm0.6)\times10^-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.
\\ ( http://arxiv.org/abs/1207.5988 , 950kb)