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arXiv 0812.0859astro-ph
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超高能Cosmic Ray光子的双对产生

Double Pair Production by Ultra High Energy Cosmic Ray Photons

S. V. Demidov, O. E. Kalashev

摘要:

利用CompHEP软件包,对光子产生双e+e对(DPP)对超高能电磁级联传输的影响进行了详细的估算。我们表明,在宇宙射线光子能量达到几千EeV的模型中,精细DPP分析可能导致预测的光子谱与以前的粗略估计相比有很大的差异。

英文摘要:

With use of CompHEP package we've made the detailed estimate of the influence of double e+e- pair production by photons (DPP) on the propagation of ultra high energy electromagnetic cascade. We show that in the models in which cosmic ray photons energy reaches few thousand EeV refined DPP analysis may lead to substantial difference in predicted photon spectrum compared to previous rough estimates.

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