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arXiv 0812.1020astro-ph
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cosmic-ray实验对超高能光子的灵敏度:超重暗物质的光谱重建和极限

Sensitivity of cosmic-ray experiments to ultra-high-energy photons: reconstruction of the spectrum and limits on the superheavy dark matter

O. E. Kalashev, G. I. Rubtsov, S. V. Troitsky

摘要:

我们估计了各种探测超高能宇宙射线的实验对能量高于10^19 eV的初级光子的灵敏度。我们证明了一个主要的光子的能量可能会显着(高达10倍)下或高估特定的主要能量和到达方向。我们考虑重建的宇宙射线光谱的光子组件的失真。作为一个例子,我们使用这些结果来约束超重暗物质模型的参数空间,通过观测到的光谱和现有的限制的光子含量。我们发现,超重暗物质衰变的超高能粒子(光子和质子)的显着贡献是允许的所有这些限制。

英文摘要:

We estimate the sensitivity of various experiments detecting ultra-high-energy cosmic rays to primary photons with energies above 10^19 eV. We demonstrate that the energy of a primary photon may be significantly (up to a factor of ~ 10) under- or overestimated for particular primary energies and arrival directions. We consider distortion of the reconstructed cosmic-ray spectrum for the photonic component. As an example, we use these results to constrain the parameter space of models of superheavy dark matter by means of both the observed spectra and available limits on the photon content. We find that a significant contribution of ultra-high-energy particles (photons and protons) from decays of superheavy dark matter is allowed by all these constraints.

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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