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2009

Is the PAMELA anomaly caused by the supernova explosions near the Earth?

Fujita, Yutaka, Kohri, Kazunori, Yamazaki, Ryo et al.

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We show that the anomaly of the positron fraction observed by the PAMELA experiment can be attributed to recent supernova explosion(s) in a dense gas cloud (DC) near the Earth.

Protons are accelerated around the supernova remnant (SNR).
Electrons and positrons are created through hadronic interactions inside the DC.
Their spectrum is harder than that of the background because the SNR spends much time in a radiative phase.

Is the PAMELA anomaly caused by the supernova explosions near the Earth? · Around

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