The cosmic ray antiproton background for AMS-02

被引：64
作者：
Kappl, Rolf [1 ,2 ]
Winkler, Martin Wolfgang [3 ]
机构：
[1] Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany
[2] Univ Bonn, Phys Inst, D-53115 Bonn, Germany
[3] Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2014年 / 09期
关键词：
cosmic ray theory; cosmic ray experiments; INCLUSIVE PRODUCTION; DIFFUSION-MODEL; P+C COLLISIONS; PROTON; PROPAGATION; SPECTRA; B/C;
D O I：
10.1088/1475-7516/2014/09/051
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
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.
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页数：24
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