Results from the first science run of the ZEPLIN-III dark matter search experiment

被引:153
作者
Lebedenko, V. N.
Araujo, H. M. [2 ]
Barnes, E. J. [3 ]
Bewick, A.
Cashmore, R. [4 ]
Chepel, V. [5 ]
Currie, A.
Davidge, D.
Dawson, J.
Durkin, T. [2 ]
Edwards, B. [2 ]
Ghag, C. [3 ]
Horn, M.
Howard, A. S.
Hughes, A. J. [2 ]
Jones, W. G.
Joshi, M.
Kalmus, G. E. [2 ]
Kovalenko, A. G. [6 ]
Lindote, A. [5 ]
Liubarsky, I.
Lopes, M. I. [5 ]
Luescher, R. [2 ]
Majewski, P. [2 ]
Murphy, A. St. J. [3 ]
Neves, F. [5 ]
da Cunha, J. Pinto [5 ]
Preece, R. [2 ]
Quenby, J. J.
Scovell, P. R. [3 ]
Silva, C. [5 ]
Solovov, V. N. [5 ]
Smith, N. J. T. [2 ]
Smith, P. F. [2 ]
Stekhanov, V. N. [6 ]
Sumner, T. J. [1 ]
Thorne, C.
Walker, R. J.
机构
[1] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, High Energy Phys Grp, London SW7 2AZ, England
[2] Rutherford Appleton Lab, Particle Phys Dept, Chilton OX11 0QX, England
[3] Univ Edinburgh, SUPA, Sch Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland
[4] Univ Oxford Brasenose Coll, Oxford OX1 4AJ, England
[5] Univ Coimbra, Dept Fis, LIP Coimbra, P-3004516 Coimbra, Portugal
[6] Inst Theoret & Expt Phys, Moscow 117218, Russia
来源
PHYSICAL REVIEW D | 2009年 / 80卷 / 05期
关键词
LIQUID XENON; SCINTILLATION EFFICIENCY; LOW-ENERGY; DETECTOR; PERFORMANCE; RECOILS;
D O I
10.1103/PhysRevD.80.052010
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
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 similar to 10 keV nuclear-recoil energy. An analysis of 847 kg . days of data acquired between February 27, 2008, and May 20, 2008, has excluded a WIMP-nucleon elastic scattering spin-independent cross section above 8.1 x 10(-8) pb at 60 GeVc(-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.
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页数:14
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