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arXiv 0706.2086astro-ph
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质子-空气截面与簇射纵向剖面起伏的关系

On the relation between the proton-air cross section and fluctuations of the shower longitudinal profile

R. Ulrich, J. Blümer, R. Engel, F. Schüssler, M. Unger

摘要:

讨论了利用荧光望远镜测量大范围空气簇射反推质子-空气截面的现状和前景。由于不可能直接观测到第一个相互作用点$X_ {\rm 1}$,因此必须从测量的纵向剖面中推断出与$X_{\rm 1}$密切相关的其他可观测量。这引入了对用于描述簇射发展的模型的依赖。讨论了由这种模型依赖性、重建方法本身以及所选簇射样本可能的非质子污染引起的系统不确定性。

英文摘要:

The current status and prospects of deducing the proton-air cross section from fluorescence telescope measurements of extensive air showers are discussed. As it is not possible to observe the point of first interaction, $X_ {\rm 1}$, directly, other observables closely linked to $X_{\rm 1}$ must be inferred from the measured longitudinal profiles. This introduces a dependence on the models used to describe the shower development. Systematic uncertainties arising from this model dependence, from the reconstruction method itself and from a possible non-proton contamination of the selected shower sample are discussed.

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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