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arXiv 1010.3580hep-phastro-ph.COastro-ph.HE
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轴子与宇宙射线

Axions and Cosmic Rays

Domenec Espriu, Albert Renau

摘要:

本文研究了带电粒子在空间常数但时间依赖的赝标背景中的传播。物理上,这种赝标量背景可以由残余轴子密度提供。背景导致洛伦兹不变性的显式破坏;因此,诸如$p\to p γ$或$e\to e γ$的过程在某些运动学约束内是可能的。这一现象描述的QED拉格朗日扩展与陈-西蒙斯项,其中包含一个4-向量,其特征在于打破洛伦兹不变性诱导的时间依赖性的背景。虽然感应的辐射(类似于切伦科夫效应)太小,不足以以显著的方式影响宇宙射线的传播,但假设通过这种机制探测到高能宇宙射线辐射的光子,将提供一种间接的方式来验证轴子的宇宙学相关性。我们讨论了影响的数量级。

英文摘要:

We investigate the propagation of a charged particle in a spatially constant but time dependent pseudoscalar background. Physically this pseudoscalar background could be provided by a relic axion density. The background leads to an explicit breaking of Lorentz invariance; as a consequence processes such as $p\to p γ$ or $e\to e γ$ are possible within some kinematical constraints. The phenomenon is described by the QED lagrangian extended with a Chern-Simons term that contains a 4-vector which characterizes the breaking of Lorentz invariance induced by the time-dependent background. While the radiation induced (similar to the Cherenkov effect) is too small to influence the propagation of cosmic rays in a significant way, the hypothetical detection of the photons radiated by high energy cosmic rays via this mechanism would provide an indirect way of verifying the cosmological relevance of axions. We discuss on the order of magnitude of the effect.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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