WIMP-nucleon cross-section results from the second science run of ZEPLIN-III
WIMP-nucleon cross-section results from the second science run of ZEPLIN-III
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DOI：
10.1016/j.physletb.2012.01.064
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发表时间：
2011-10
影响因子：
4.4
通讯作者：
D. Akimov;H. Araújo;E. Barnes;V. Belov;A. Bewick;A. Burenkov;V. Chepel;A. Currie;L. deViveiros;B. Edwards;C. Ghag;A. Hollingsworth;M. Horn;W. Jones;G. Kalmus;A. Kobyakin;A. Kovalenko;V. Lebedenko;A. Lindote;A. Lindote;M. Lopes;R. Lüscher;P. Majewski;A. Murphy;F. Neves;F. Neves;S. Paling;J. G. D. Cunha;R. Preece;J. Quenby;L. Reichhart;P. Scovell;C. Silva;V. Solovov;N. Smith;V. Stekhanov;T. Sumner;C. Thorne;R. Walker
中科院分区：
文献类型：
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作者：
D. Akimov;H. Araújo;E. Barnes;V. Belov;A. Bewick;A. Burenkov;V. Chepel;A. Currie;L. deViveiros;B. Edwards;C. Ghag;A. Hollingsworth;M. Horn;W. Jones;G. Kalmus;A. Kobyakin;A. Kovalenko;V. Lebedenko;A. Lindote;A. Lindote;M. Lopes;R. Lüscher;P. Majewski;A. Murphy;F. Neves;F. Neves;S. Paling;J. G. D. Cunha;R. Preece;J. Quenby;L. Reichhart;P. Scovell;C. Silva;V. Solovov;N. Smith;V. Stekhanov;T. Sumner;C. Thorne;R. Walker
我们报告的实验上限WIMP核子弹性散射截面从第二次科学运行ZEPLIN-III在博尔比地下实验室。在2010年6月至2011年5月的319天连续运营期间，累计了1344公斤/天的原始基准暴露量。在7-29 keV的核反冲能量范围内的信号接受区域内，共观察到8个事件，这与背景预期相符。这使得在90%的置信度下，排除了在50 GeV/c2 WIMP质量附近超过4.8×10− 8 pb的标量截面。结合第一次运行的数据，这个结果提高到3.9×10− 8 pb。相应的WIMP中子自旋相关截面极限为8.0×10− 3 pb。ZEPLIN计划就这样在博尔比结束了，成功地部署和利用了三个范围不断扩大的液体氙实验。
We report experimental upper limits on WIMP-nucleon elastic scattering cross sections from the second science run of ZEPLIN-III at the Boulby Underground Laboratory. A raw fiducial exposure of 1344 kg⋅days was accrued over 319 days of continuous operation between June 2010 and May 2011. A total of eight events was observed in the signal acceptance region in the nuclear recoil energy range 7–29 keV, which is compatible with background expectations. This allows the exclusion of the scalar cross-section above 4.8×10−8pb near 50 GeV/c2WIMP mass with 90% confidence. Combined with data from the first run, this result improves to 3.9×10−8pb. The corresponding WIMP-neutron spin-dependent cross-section limit is 8.0×10−3pb. The ZEPLIN programme reaches thus its conclusion at Boulby, having deployed and exploited successfully three liquid xenon experiments of increasing reach.