二次下降作为超高能质子与宇宙微波背景辐射相互作用的特征。
Second dip as a signature of ultrahigh energy proton interactions with cosmic microwave background radiation.
作者信息
Berezinsky V, Gazizov A, Kachelrieb M
机构信息
INFN, Laboratori Nazionali del Gran Sasso, I-67010 Assergi (AQ), Italy.
出版信息
Phys Rev Lett. 2006 Dec 8;97(23):231101. doi: 10.1103/PhysRevLett.97.231101.
We discuss as a new signature for the interaction of extragalactic ultrahigh energy protons with cosmic microwave background radiation a spectral feature located at E= 6.3 x 10(19) eV in the form of a narrow and shallow dip. It is produced by the interference of e+e(-)-pair and pion production. We show that this dip and, in particular, its position are almost model-independent. Its observation by future ultrahigh energy cosmic ray detectors may give the conclusive confirmation that an observed steepening of the spectrum is caused by the Greisen-Zatsepin-Kuzmin effect.
我们讨论了作为河外超高能质子与宇宙微波背景辐射相互作用的一种新特征，即位于E = 6.3×10¹⁹ eV处呈窄而浅的凹陷形式的光谱特征。它是由正负电子对产生和π介子产生的干涉所产生的。我们表明，这种凹陷，特别是其位置几乎与模型无关。未来超高能宇宙射线探测器对其进行观测，可能会确凿地证实观测到的光谱变陡是由格里森-扎采平-库兹明效应引起的。
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