Has the GZK suppression been discovered?

被引：82

作者：

Bahcall, JN

Waxman, E

机构：

[1] Inst Adv Study, Sch Nat Sci, Princeton, NJ 08540 USA

[2] Weizmann Inst Sci, Fac Phys, IL-76100 Rehovot, Israel

来源：

PHYSICS LETTERS B | 2003年 / 556卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0370-2693(03)00105-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The energy spectra of ultra-high energy cosmic rays reported by the AGASA, Fly's Eye, Haverah Park, HiRes, and Yakutsk experiments are all shown to be in agreement with each other for energies below 10(20) eV (after small adjustments, within the known uncertainties, of the absolute energy scales). The data from HiRes, Fly's Eye, and Yakutsk are consistent with the expected flux suppression above 5 x 10(19) eV due to interactions of cosmic rays with the cosmic microwave background, the Greisen-Zatsepin-Kuzmin (GZK) suppression, and are inconsistent with a smooth extrapolation of the observed cosmic-ray energy spectrum to energies > 5 x 10(19) eV. AGASA data show an excess of events above 10(20) eV, compared to the predicted GZK suppression and to the flux measured by the other experiments. (C) 2003 Published by Elsevier Science B.V.

引用

页码：1 / 6

页数：6

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