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arXiv 1408.0299hep-phastro-ph.COastro-ph.HE
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AMS-02的Cosmic Ray反质子背景

The Cosmic Ray Antiproton Background for AMS-02

Rolf Kappl, Martin Wolfgang Winkler

摘要:

AMS-02实验正在高精度地测量宇宙线反质子通量。对即将到来的数据的解释需要对次级反质子背景的透彻理解。在这项工作中,我们采用最新获得的数据NA 49实验在欧洲核子研究中心,以重新计算的反质子源项所产生的宇宙射线散裂的星际物质。我们系统地解释了超子衰变产生反质子的过程,并讨论了同位旋效应对反中子产生的可能影响。我们的计算与现有的文献,以及与Monte Carlo为基础的反质子源项的评估提供了详细的比较。我们最重要的结果是一个更新的预测次级反质子通量,其中包括在所有能量的粒子物理不确定性的现实评估。

英文摘要:

The AMS-02 experiment is measuring the cosmic ray antiproton flux with high precision. The interpretation of the upcoming data requires a thorough understanding of the secondary antiproton background. In this work, we employ newly available data of the NA49 experiment at CERN, in order to recalculate the antiproton source term arising from cosmic ray spallations on the interstellar matter. We systematically account for the production of antiprotons via hyperon decay and discuss the possible impact of isospin effects on antineutron production. A detailed comparison of our calculation with the existing literature as well as with Monte Carlo based evaluations of the antiproton source term is provided. Our most important result is an updated prediction for the secondary antiproton flux which includes a realistic assessment of the particle physics uncertainties at all energies.

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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