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arXiv 0912.3897astro-ph.HEastro-ph.GAhep-ph
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银河系超新星的超高能宇宙射线

Ultra-High Energy Cosmic Rays from Galactic Supernovae

Richard Shurtleff

摘要:

假设即使是在地球上观测到的最高能量的宇宙射线(CR)也是在本地银河系源加速的质子,很少有来自更遥远的源的。在本文中,我们处理的问题,超新星遗迹可能会产生质子的能量高达约一个PeV,但CR与100 s的EeV的能量观察。我们假设“新物理学”在起作用,我们接受CR在地球上的碰撞能量超过它在银河系中旅行时的动能。有一些证据表明,碰撞能量-动能的差异已经在Tevatron和LHC上看到,但它足够小,可以归因于标准物理学。这为能量分叉设置了阈值。基于该阈值和CR谱端点,导出了碰撞能与动能的关系式。利用该函数和观测到的CR谱,我们可以预测CR源的平均谱。同时,我们也可以估算出当地面粒子加速器推进并产生更高动能的质子束时的碰撞能量。

英文摘要:

Suppose that even the highest energy cosmic rays (CRs) observed on Earth are protons accelerated in local Milky Way Galaxy sources, with few if any from more distant sources. In this paper we treat the problem that supernovae remnants likely produce protons with energies up to about a PeV, but CRs with 100s of EeV energy are observed. We assume with minimal comment the idea that `new physics' is at work and we accept that a CR's collision energy at the Earth exceeds its kinetic energy as it travels through the Galaxy. There is some evidence that the collision energy-kinetic energy difference has been seen at the Tevatron and LHC, but it is small enough to attribute to standard physics. This sets the threshold for energy bifurcation. Based on this threshold and the CR spectrum endpoint, a formula for collision energy as a function of kinetic energy is derived. With the function and the observed CR spectrum we can predict the average spectrum of CR sources. Also we can estimate the collision energies of proton beams as terrestrial particle accelerators advance and produce beams with higher kinetic energies.

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