Corpus ID: 118767450

On the Positron Fraction and Cosmic-Ray Propagation Models

@article{Burch2010OnTP,
  title={On the Positron Fraction and Cosmic-Ray Propagation Models},
  author={Benjamin Burch and Ramanath Cowsik},
  journal={arXiv: High Energy Astrophysical Phenomena},
  year={2010}
}
  • B. Burch, R. Cowsik
  • Published 7 September 2010
  • Physics
  • arXiv: High Energy Astrophysical Phenomena
The positron fraction observed by PAMELA and other experiments up to ~ 100 GeV is analyzed in terms of models of cosmic-ray propagation. It is shown that generically we expect the positron fraction to reach ~ 0.6 at energies of several TeV, and its energy dependence bears an intimate but subtle connection with that of the boron to carbon ratio in cosmic rays. The observed positron fraction can be fitted in a model that assumes a significant fraction of the boron below ~ 10 GeV is generated… Expand

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