Limits on inelastic dark matter from ZEPLIN-III

Limits on inelastic dark matter from ZEPLIN-III
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DOI：
10.1016/j.physletb.2010.07.042
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发表时间：
2010-03
期刊：
Physics Letters B
影响因子：
4.4
通讯作者：
D. Akimov;H. Araújo;E. Barnes;V. Belov;A. Bewick;A. Burenkov;R. Cashmore;V. Chepel;A. Currie;D. Davidge;J. Dawson;T. Durkin;B. Edwards;C. Ghag;A. Hollingsworth;M. Horn;A. Howard;A. J. Hughes;W. Jones;G. Kalmus;A. Kobyakin;A. Kovalenko;V. Lebedenko;A. Lindote;A. Lindote;I. Liubarsky;M. Lopes;R. Lüscher;K. Lyons;P. Majewski;A. Murphy;F. Neves;F. Neves;S. Paling;J. G. D. Cunha;R. Preece;J. Quenby;L. Reichhart;P. Scovell;Catarina Silva;V. Solovov;N. Smith;P. Smith;V. Stekhanov;T. Sumner;C. Thorne;L. D. Viveiros;R. Walker
D. Akimov;H. Araújo;E. Barnes;V. Belov;A. Bewick;A. Burenkov;R. Cashmore;V. Chepel;A. Currie;D. Davidge;J. Dawson;T. Durkin;B. Edwards;C. Ghag;A. Hollingsworth;M. Horn;A. Howard;A. J. Hughes;W. Jones;G. Kalmus;A. Kobyakin;A. Kovalenko;V. Lebedenko;A. Lindote;A. Lindote;I. Liubarsky;M. Lopes;R. Lüscher;K. Lyons;P. Majewski;A. Murphy;F. Neves;F. Neves;S. Paling;J. G. D. Cunha;R. Preece;J. Quenby;L. Reichhart;P. Scovell;Catarina Silva;V. Solovov;N. Smith;P. Smith;V. Stekhanov;T. Sumner;C. Thorne;L. D. Viveiros;R. Walker
中科院分区：
物理与天体物理2区
文献类型：
--
作者：
D. Akimov;H. Araújo;E. Barnes;V. Belov;A. Bewick;A. Burenkov;R. Cashmore;V. Chepel;A. Currie;D. Davidge;J. Dawson;T. Durkin;B. Edwards;C. Ghag;A. Hollingsworth;M. Horn;A. Howard;A. J. Hughes;W. Jones;G. Kalmus;A. Kobyakin;A. Kovalenko;V. Lebedenko;A. Lindote;A. Lindote;I. Liubarsky;M. Lopes;R. Lüscher;K. Lyons;P. Majewski;A. Murphy;F. Neves;F. Neves;S. Paling;J. G. D. Cunha;R. Preece;J. Quenby;L. Reichhart;P. Scovell;Catarina Silva;V. Solovov;N. Smith;P. Smith;V. Stekhanov;T. Sumner;C. Thorne;L. D. Viveiros;R. Walker

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我们目前的限制，从2008年运行的ZEPLIN-III再分析的非弹性暗物质的WIMP核子截面。削减，特别是闪烁脉冲形状和闪烁电离比，给出了63千克/天的净照射量，在20- 80千电子伏的核反冲能量范围内，其中观察到6个事件。信号速率的上限来自数据中的最大空补丁。在标准的晕假设下，在99%的CL下，允许一个小的参数空间区域与1.17 tonyr的DAMA调制信号一致：它的质量范围是45- 60 GeVc − 2，最小CL为87%，同样来自最大补丁。这是使用氙提出的最严格的约束，氙是一种目标核，其与碘的相似性减轻了来自假设晕的系统误差。
We present limits on the WIMP–nucleon cross section for inelastic dark matter from a reanalysis of the 2008 run of ZEPLIN-III. Cuts, notably on scintillation pulse shape and scintillation-to-ionisation ratio, give a net exposure of 63kgday in the range 20–80keV nuclear recoil energy, in which 6 events are observed. Upper limits on signal rate are derived from the maximum empty patch in the data. Under standard halo assumptions a small region of parameter space consistent, at 99% CL, with causing the 1.17tonyr DAMA modulation signal is allowed at 90% CL: it is in the mass range 45–60GeVc−2with a minimum CL of 87%, again derived from the maximum patch. This is the tightest constraint yet presented using xenon, a target nucleus whose similarity to iodine mitigiates systematic error from the assumed halo.