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arXiv 1701.04865astro-ph.HE
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UHECR天体物理中Lorentz不变性破坏的极限

Limits on the Lorentz Invariance Violation from UHECR astrophysics

Rodrigo Guedes Lang, Humberto Martínez-Huerta, Vitor de Souza

摘要:

本文将洛伦兹不变性破坏(LIV)引入光子在宇宙中的传播计算。在光子扇区中考虑LIV,计算了$γγ\rightarrow e^{+} e^{-}$相互作用的平均自由程。相应的光子视界,包括LIV效应被用来预测的能量高于$10^{18}$ eV的光子的传播的主要变化。计算了几种超高能宇宙线(UHECR)源模型中考虑LIV的GZK光子在地球上的通量。GZK伽马射线的预测通量相比,皮埃尔俄歇天文台获得的光子通量的新的上限,以便施加上限的顺序$n =$ 0,1和2的LIV系数。LIV系数的限制,这里推导出的比以前的作品更现实,在某些情况下,更严格。分析结果在$δ_{γ,0}^{limit} \sim -10^{-20}$,$δ_{γ,1}^{limit} \sim -10^{-38} \; \mathrm{eV^{-1}}$和$δ_{γ,2}^{limit} \sim -10^{-56} \; \mathrm{eV^{-2}}$的光子部门的LIV上限的天体物理的情况下,最好的描述UHECR数据。

英文摘要:

In this paper, Lorentz Invariance Violation (LIV) is introduced in the calculations of photon propagation in the Universe. LIV is considered in the photon sector and the mean free path of the $γγ\rightarrow e^{+} e^{-}$ interaction is calculated. The corresponding photon horizon including LIV effects is used to predict major changes in the propagation of photons with energy above $10^{18}$ eV. The flux of GZK photons on Earth considering LIV is calculated for several source models of ultra-high energy cosmic ray (UHECR). The predicted flux of GZK gamma-rays is compared to the new upper limits on the photon flux obtained by the Pierre Auger Observatory in order to impose upper limits on the LIV coefficients of order $n =$ 0, 1 and 2. The limits on the LIV coefficients derived here are more realistic than previous works and in some cases more restrictive. The analysis resulted in LIV upper limits in the photon sector of $δ_{γ,0}^{limit} \sim -10^{-20}$, $δ_{γ,1}^{limit} \sim -10^{-38} \; \mathrm{eV^{-1}}$ and $δ_{γ,2}^{limit} \sim -10^{-56} \; \mathrm{eV^{-2}}$ in the astrophysical scenario which best describes UHECR data.

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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