DM2 - Results and Strategies in Dark Matter Detection |
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Speaker |
Kohri, Kazunori |
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| Talk 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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