Abbasi R U, Abu-Zayyad T, Allen M, Amman J F, Archbold G, Belov K, Belz J W, Ben Zvi S Y, Bergman D R, Blake S A, Brusova O A, Burt G W, Cannon C, Cao Z, Connolly B C, Deng W, Fedorova Y, Finley C B, Gray R C, Hanlon W F, Hoffman C M, Holzscheiter M H, Hughes G, Hüntemeyer P, Jones B F, Jui C C H, Kim K, Kirn M A, Loh E C, Maestas M M, Manago N, Marek L J, Martens K, Matthews J A J, Matthews J N, Moore S A, O'Neill A, Painter C A, Perera L, Reil K, Riehle R, Roberts M, Rodriguez D, Sasaki N, Schnetzer S R, Scott L M, Sinnis G, Smith J D, Sokolsky P, Song C, Springer R W, Stokes B T, Thomas S B, Thomas J R, Thomson G B, Tupa D, Westerhoff S, Wiencke L R, Zhang X, Zech A
Department of Physics, University of Utah, Salt Lake City, Utah 84112, USA.
Phys Rev Lett. 2008 Mar 14;100(10):101101. doi: 10.1103/PhysRevLett.100.101101. Epub 2008 Mar 10.
The High Resolution Fly's Eye (HiRes) experiment has observed the Greisen-Zatsepin-Kuzmin suppression (called the GZK cutoff) with a statistical significance of five standard deviations. HiRes' measurement of the flux of ultrahigh energy cosmic rays shows a sharp suppression at an energy of 6 x 10(19) eV, consistent with the expected cutoff energy. We observe the ankle of the cosmic-ray energy spectrum as well, at an energy of 4 x 10(18) eV. We describe the experiment, data collection, and analysis and estimate the systematic uncertainties. The results are presented and the calculation of the statistical significance of our observation is described.
高分辨率蝇眼（HiRes）实验以五个标准差的统计显著性观测到了格里斯森-扎采平-库兹明抑制（称为GZK截断）。HiRes对超高能宇宙射线通量的测量显示，在能量为6×10¹⁹电子伏特时出现了急剧抑制，这与预期的截断能量一致。我们还在能量为4×10¹⁸电子伏特时观测到了宇宙射线能谱的拐折点。我们描述了该实验、数据收集和分析过程，并估计了系统不确定性。展示了结果，并描述了对我们观测的统计显著性的计算。
