English

Absolute electron and positron fluxes from PAMELA/Fermi and Dark Matter

High Energy Physics - Phenomenology 2009-11-19 v3 High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology

Abstract

We extract the positron and electron fluxes in the energy range 10 - 100 GeV by combining the recent data from PAMELA and Fermi LAT. The {\it absolute positron and electron} fluxes thus obtained are found to obey the power laws: E2.65E^{-2.65} and E3.06E^{-3.06} respectively, which can be confirmed by the upcoming data from PAMELA. The positron flux appears to indicate an excess at energies E\gsim50E\gsim 50 GeV even if the uncertainty in the secondary positron flux is added to the Galactic positron background. This leaves enough motivation for considering new physics, such as annihilation or decay of dark matter, as the origin of positron excess in the cosmic rays.

Keywords

Cite

@article{arxiv.0905.4302,
  title  = {Absolute electron and positron fluxes from PAMELA/Fermi and Dark Matter},
  author = {C. Balázs and N. Sahu and A. Mazumdar},
  journal= {arXiv preprint arXiv:0905.4302},
  year   = {2009}
}

Comments

Accepted by JCAP