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arXiv 1005.0380astro-ph.CO
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来自XENON100实验的第一个暗物质结果

First Dark Matter Results from the XENON100 Experiment

The XENON100 Collaboration, E. Aprile, K. Arisaka, F. Arneodo, A. Askin, L. Baudis, A. Behrens, E. Brown, J. M. R. Cardoso, B. Choi, D. B. Cline, S. Fattori, A.… 展开作者

The XENON100 Collaboration, E. Aprile, K. Arisaka, F. Arneodo, A. Askin, L. Baudis, A. Behrens, E. Brown, J. M. R. Cardoso, B. Choi, D. B. Cline, S. Fattori, A. D. Ferella, K. -L. Giboni, K. Hugenberg, A. Kish, C. W. Lam, J. Lamblin, R. F. Lang, K. E. Lim, J. A. M. Lopes, T. Marrodán Undagoitia, Y. Mei, A. J. Melgarejo Fernandez, K. Ni, U. Oberlack, S. E. A. Orrigo, E. Pantic, G. Plante, A. C. C. Ribeiro, R. Santorelli, J. M. F. dos Santos, M. Schumann, P. Shagin, A. Teymourian, D. Thers, E. Tziaferi, H. Wang, C. Weinheimer

摘要:

XENON 100实验在意大利的Gran Sasso国家实验室进行,目的是在超低背景双相时间投影室中寻找散射62公斤液态氙的暗物质WIMP。在这封信中,我们提出了第一个暗物质的结果,从分析11.17天的非盲数据,在2009年10月和11月获得。在选定的40 kg基准靶中,在预定义的信号区域内,我们没有观察到任何事件,因此排除了在90%置信水平下,对于55 GeV/c^2的WIMP,自旋无关的WIMP-核子弹性散射截面大于3.4 x 10^-44 cm ^2的情况。在20 GeV/c^2以下,这一结果限制了对CoGeNT和DAMA信号的解释,即它们是由自旋无关的、弹性的、轻质量的WIMP相互作用引起的。

英文摘要:

The XENON100 experiment, in operation at the Laboratori Nazionali del Gran Sasso in Italy, is designed to search for dark matter WIMPs scattering off 62 kg of liquid xenon in an ultra-low background dual-phase time projection chamber. In this letter, we present first dark matter results from the analysis of 11.17 live days of non-blind data, acquired in October and November 2009. In the selected fiducial target of 40 kg, and within the pre-defined signal region, we observe no events and hence exclude spin-independent WIMP-nucleon elastic scattering cross-sections above 3.4 x 10^-44 cm^2 for 55 GeV/c^2 WIMPs at 90% confidence level. Below 20 GeV/c^2, this result constrains the interpretation of the CoGeNT and DAMA signals as being due to spin-independent, elastic, light mass WIMP interactions.

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