Results from the first science run of the ZEPLIN-III dark matter search experiment
Results from the first science run of the ZEPLIN-III dark matter search experiment
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DOI：
10.1103/physrevd.80.052010
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发表时间：
2008-12
影响因子：
5
通讯作者：
V. Lebedenko;H. Araújo;E. Barnes;A. Bewick;R. Cashmore;V. Chepel;A. Currie;D. Davidge;J. Dawson;T. Durkin;B. Edwards;C. Ghag;M. Horn;A. Howard;A. J. Hughes;W. Jones;M. Joshi;G. Kalmus;A. Kovalenko;A. Lindote;I. Liubarsky;M. Lopes;R. Lüscher;P. Majewski;A. Murphy;F. Neves;J. G. D. Cunha;R. Preece;J. Quenby;P. Scovell;C. Silva;V. Solovov;N. Smith;P. Smith;V. Stekhanov;T. Sumner;C. Thorne;R. Walker
中科院分区：
文献类型：
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作者：
V. Lebedenko;H. Araújo;E. Barnes;A. Bewick;R. Cashmore;V. Chepel;A. Currie;D. Davidge;J. Dawson;T. Durkin;B. Edwards;C. Ghag;M. Horn;A. Howard;A. J. Hughes;W. Jones;M. Joshi;G. Kalmus;A. Kovalenko;A. Lindote;I. Liubarsky;M. Lopes;R. Lüscher;P. Majewski;A. Murphy;F. Neves;J. G. D. Cunha;R. Preece;J. Quenby;P. Scovell;C. Silva;V. Solovov;N. Smith;P. Smith;V. Stekhanov;T. Sumner;C. Thorne;R. Walker
位于博尔比的帕尔默地下实验室的ZEPLIN-III实验使用一个12公斤重的两相氙时间投影室来寻找可能构成我们银河系暗物质的弱相互作用大质量粒子（wimp）。该探测器测量由辐射在液体中相互作用产生的闪烁和电离，以区分wimp预期的核反冲和电子反冲背景信号，核反冲能量低至{大约}10 keV。对2008年2月27日至2008年5月20日期间获得的847 kg{center_dot}天的数据进行分析，排除了在60 GeVc{sup -2}下超过8.1x10{sup -8} pb的wimp -核子弹性散射自旋无关截面，置信限为90%。它还证明了两相氙技术能够更好地区分低能量下的电子和核反冲，而不是以前的其他基于氙的实验。
The ZEPLIN-III experiment in the Palmer Underground Laboratory at Boulby uses a 12 kg two-phase xenon time-projection chamber to search for the weakly interacting massive particles (WIMPs) that may account for the dark matter of our Galaxy. The detector measures both scintillation and ionization produced by radiation interacting in the liquid to differentiate between the nuclear recoils expected from WIMPs and the electron-recoil background signals down to {approx}10 keV nuclear-recoil energy. An analysis of 847 kg{center_dot}days of data acquired between February 27, 2008, and May 20, 2008, has excluded a WIMP-nucleon elastic scattering spin-independent cross section above 8.1x10{sup -8} pb at 60 GeVc{sup -2} with a 90% confidence limit. It has also demonstrated that the two-phase xenon technique is capable of better discrimination between electron and nuclear recoils at low-energy than previously achieved by other xenon-based experiments.