On the cosmic electron/positron excesses and the knee of the cosmic rays -- a key to the 50 years' puzzle?

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  • 12 January 2009
Abstract
Stimulated by the recent measurements on the electron spectrum by ATIC and positron fraction by PAMELA, we explore the correlation between the electron/positron excesses and the knee of the cosmic rays. In this work we ascribe the knee to the process of e$^+$e$^-$ pair production by interactions between high energy cosmic rays and background photons at the cosmic ray accelerating sources. With Monte-Carlo technique, the spectra of cosmic nuclei and electrons/positrons are calculated. The proton, Helium, Iron and all-particle spectra from low energy to high energies are well described. The generated electrons/positrons in pair production can explain the ATIC and PAMELA data quite well.

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