MG14 - Talk detail |
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Participant |
Kohri, Kazunori | |||||||
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Institution |
KEK - Oho 1-1 - Tsukuba - Ibaraki - Japan | |||||||
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Session |
DM2 |
Accepted |
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Order |
Time |
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Talk |
Oral abstract |
Title |
Can we explain AMS-02 antiproton and positron excesses simultaneously ? | |||||
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Abstract |
I explain the excess of the antiproton fraction recently reported by the AMS-02 experiment by considering collisions between cosmic-ray protons accelerated by a local supernova remnant (SNR) and the surrounding dense cloud. The same "pp collisions" provide the right branching ratio to fit the observed positron excess simultaneously without a fine tuning. The supernova happened in relatively lower metalicity than the major cosmic-ray sources. The cutoff energy of electrons marks the supernova age of ~10^{5} years, while the antiproton excess may extend to higher energy. Both antiproton and positron fluxes are completely consistent with our predictions in Fujita, Kohri, Yamazaki and Ioka (2009). In addition, I also introduce my dark matter scenarios. |
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