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arXiv 0802.3530astro-ph
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用CDMS的前五塔数据寻找弱相互作用粒子

A Search for WIMPs with the First Five-Tower Data from CDMS

CDMS Collaboration

摘要:

我们报告的第一个结果,从低温暗物质搜索(CDMS II)的实验运行其完整的30个低温粒子探测器在苏丹地下实验室。本报告基于对2006年10月至2007年7月期间从15个锗探测器(3.75千克)获得的数据的分析,得出有效照射量为121.3千克-日(反冲能量10- 100千电子伏的平均值,按质量为60 \gev的弱相互作用大质量粒子加权)。盲分析,结合改进的技术,事件重建和数据质量监测,导致零观察到的事件。该分析将WIMP-核子自旋无关截面的上限设定为6.6 $\times10^{-44}$ cm $^2$(当与之前的CDMS Soudan数据结合时为4.6 $\times10^{-44}$ cm $^2$),WIMP质量为60 \gev,置信水平为90%。通过为质量超过42 GeV/c $^2$的暗物质WIMP提供最佳灵敏度,这项工作显着限制了一些受欢迎的超对称模型的参数空间。

英文摘要:

We report first results from the Cryogenic Dark Matter Search (CDMS II) experiment running with its full complement of 30 cryogenic particle detectors at the Soudan Underground Laboratory. This report is based on the analysis of data acquired between October 2006 and July 2007 from 15 Ge detectors (3.75 kg), giving an effective exposure of 121.3 kg-d (averaged over recoil energies 10--100 keV, weighted for a weakly interacting massive particle (WIMP) mass of 60 \gev). A blind analysis, incorporating improved techniques for event reconstruction and data quality monitoring, resulted in zero observed events. This analysis sets an upper limit on the WIMP-nucleon spin-independent cross section of 6.6$\times10^{-44}$ cm$^2$ (4.6$\times10^{-44}$ cm$^2$ when combined with previous CDMS Soudan data) at the 90% confidence level for a WIMP mass of 60 \gev. By providing the best sensitivity for dark matter WIMPs with masses above 42 GeV/c$^2$, this work significantly restricts the parameter space for some of the favored supersymmetric models.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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