Indications for a High-Rigidity Break in the Cosmic-Ray Diffusion Coefficient
Using cosmic-ray boron to carbon ratio (B/C) data recently released by the Ams-02 experiment, we find indications (decisive evidence, in Bayesian terms) in favor of a diffusive propagation origin for the broken power-law spectra found in protons (p) and helium nuclei (He). The result is robust with...
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| Veröffentlicht in: | Physical review letters 2017-12, Vol.119 (24), p.241101-241101, Article 241101 |
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| container_end_page | 241101 |
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| container_issue | 24 |
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| container_title | Physical review letters |
| container_volume | 119 |
| creator | Génolini, Yoann Serpico, Pasquale D Boudaud, Mathieu Caroff, Sami Poulin, Vivian Derome, Laurent Lavalle, Julien Maurin, David Poireau, Vincent Rosier, Sylvie Salati, Pierre Vecchi, Manuela |
| description | Using cosmic-ray boron to carbon ratio (B/C) data recently released by the Ams-02 experiment, we find indications (decisive evidence, in Bayesian terms) in favor of a diffusive propagation origin for the broken power-law spectra found in protons (p) and helium nuclei (He). The result is robust with respect to currently estimated uncertainties in the cross sections, and in the presence of a small component of primary boron, expected because of spallation at the acceleration site. Reduced errors at high energy as well as further cosmic ray nuclei data (as absolute spectra of C, N, O, Li, Be) may definitively confirm this scenario. |
| doi_str_mv | 10.1103/physrevlett.119.241101 |
| format | Article |
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| subjects | Astrophysics High Energy Astrophysical Phenomena Physics |
| title | Indications for a High-Rigidity Break in the Cosmic-Ray Diffusion Coefficient |
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