最高能宇宙射線、普朗克統一理論與 diffuse gamma 射線背景
天体物理学
2008-02-03 v2 高能物理 - 唯象学
摘要
我們探討最高能宇宙射線（HECR）由普朗克統一尺度的新粒子物理學生成的情境。利用對遠行宇宙射線與 gamma 射線傳播的詳細數值模擬，我們展示出存在顯著的參數空間，使得此類情境與所有觀測限制相容。大約 10% 的 gamma 射線佔總宇宙射線濃度在約 10 EeV [10**(19) eV] 時段，意味著 HECR 來源非加速性質，以及遠行宇宙磁場小於約 G。提議的 ultra-high energy 宇宙射線觀測器應能測試此類特徵。
关键词
引用
@article{arxiv.astro-ph/9604093,
title = {Highest Energy Cosmic Rays, Grand Unified Theories, and the Diffuse Gamma-Ray Background},
author = {Guenter Sigl and Sangjin Lee and Paolo Coppi},
journal= {arXiv preprint arXiv:astro-ph/9604093},
year = {2008}
}
备注
5 latex pages, 3 postscript figures included, uses revtex.sty and psfig.sty. Considerably revised version, uses improved QCD fragmentation functions and normalization procedure to the data and reaches somewhat more general conclusions. Differences to results in astro-ph/9605036 by Protheroe/Stanev are pointed out. Submitted to Phys. Rev. Lett