从LUX完整曝光数据得出的自旋相关弱相互作用大质量粒子-核子截面的限制。
Limits on Spin-Dependent WIMP-Nucleon Cross Section Obtained from the Complete LUX Exposure.
作者信息
Akerib D S, Alsum S, Araújo H M, Bai X, Bailey A J, Balajthy J, Beltrame P, Bernard E P, Bernstein A, Biesiadzinski T P, Boulton E M, Brás P, Byram D, Cahn S B, Carmona-Benitez M C, Chan C, Chiller A A, Chiller C, Currie A, Cutter J E, Davison T J R, Dobi A, Dobson J E Y, Druszkiewicz E, Edwards B N, Faham C H, Fallon S R, Fiorucci S, Gaitskell R J, Gehman V M, Ghag C, Gilchriese M G D, Hall C R, Hanhardt M, Haselschwardt S J, Hertel S A, Hogan D P, Horn M, Huang D Q, Ignarra C M, Jacobsen R G, Ji W, Kamdin K, Kazkaz K, Khaitan D, Knoche R, Larsen N A, Lee C, Lenardo B G, Lesko K T, Lindote A, Lopes M I, Manalaysay A, Mannino R L, Marzioni M F, McKinsey D N, Mei D-M, Mock J, Moongweluwan M, Morad J A, Murphy A St J, Nehrkorn C, Nelson H N, Neves F, O'Sullivan K, Oliver-Mallory K C, Palladino K J, Pease E K, Reichhart L, Rhyne C, Shaw S, Shutt T A, Silva C, Solmaz M, Solovov V N, Sorensen P, Stephenson S, Sumner T J, Szydagis M, Taylor D J, Taylor W C, Tennyson B P, Terman P A, Tiedt D R, To W H, Tripathi M, Tvrznikova L, Uvarov S, Velan V, Verbus J R, Webb R C, White J T, Whitis T J, Witherell M S, Wolfs F L H, Xu J, Yazdani K, Young S K, Zhang C
机构信息
Case Western Reserve University, Department of Physics, 10900 Euclid Avenue, Cleveland, Ohio 44106, USA.
SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94205, USA.
出版信息
Phys Rev Lett. 2017 Jun 23;118(25):251302. doi: 10.1103/PhysRevLett.118.251302.
We present experimental constraints on the spin-dependent WIMP-nucleon elastic cross sections from the total 129.5 kg yr exposure acquired by the Large Underground Xenon experiment (LUX), operating at the Sanford Underground Research Facility in Lead, South Dakota (USA). A profile likelihood ratio analysis allows 90% C.L. upper limits to be set on the WIMP-neutron (WIMP-proton) cross section of σ_{n}=1.6×10^{-41} cm^{2} (σ_{p}=5×10^{-40} cm^{2}) at 35 GeV c^{-2}, almost a sixfold improvement over the previous LUX spin-dependent results. The spin-dependent WIMP-neutron limit is the most sensitive constraint to date.
我们展示了来自大型地下氙实验（LUX）在美国南达科他州利德市桑福德地下研究设施运行期间获得的总计129.5千克·年曝光量的对与自旋相关的弱相互作用大质量粒子 - 核子弹性截面的实验限制。通过轮廓似然比分析，在35 GeV c⁻² 时，对弱相互作用大质量粒子 - 中子（弱相互作用大质量粒子 - 质子）截面σₙ = 1.6×10⁻⁴¹ cm²（σₚ = 5×10⁻⁴⁰ cm²）设定了90%置信水平上限，相较于之前LUX的自旋相关结果有近六倍的改进。与自旋相关的弱相互作用大质量粒子 - 中子限制是迄今为止最灵敏的限制。
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