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A Combined Interpretation of CR Nuclei and Antiproton High Energy Measurements

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arxiv 0907.3289 v2 submitted 2009-07-19 astro-ph.HE

A Combined Interpretation of CR Nuclei and Antiproton High Energy Measurements

classification astro-ph.HE
keywords diffusionenergydatahighmeasurementswellaboveaccuracy
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In the last months several ballon and satellite experiments improved significantly our knowledge of cosmic rays (CR) spectra at high energy. In particular CREAM allowed to measure B/C, C/O and N/O up to 1 TeV and PAMELA the anti-p/p ratio up to 100 GeV with unprecedented accuracy. These measurements offer a valuable probe of CR propagation properties. We performed a statistical analysis to test the compatibility of these results, as well as other most significant experimental data, with the predictions of a new numerical CR diffusion package (DRAGON). We found that above 1 GeV all data are consistent with a diffusion scenario in a well defined range of values of the diffusion coefficient energy power index and normalization.

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