The European Physical Journal C

, Volume 67, Issue 3–4, pp 479–487 | Cite as

Resolving Fermi, PAMELA and ATIC anomalies in split supersymmetry without R-parity

  • Chuan-Hung Chen
  • Chao-Qiang Geng
  • Dmitry V. Zhuridov
Regular Article - Theoretical Physics

Abstract

A long-lived decaying dark matter as a resolution to Fermi, PAMELA and ATIC anomalies is investigated in the framework of split supersymmetry (SUSY) without R-parity, where the neutralino is regarded as the dark matter and the extreme fine-tuned couplings for the long-lived neutralino are naturally evaded in the usual approach. The energy spectra of electron and positron are from not only the direct neutralino decays denoted by χe + e ν, but also the decaying chains such as \(\chi\to e^{+}\nu\mu(\to \nu_{\mu}e\bar{\nu}_{e})\). We find that with a proper lifetime of the neutralino, slepton-mediated effects could explain the ATIC and PAMELA data well, but an inconsistence occurs to the Fermi and PAMELA data without considering the ATIC one. However, by a suitable combination of χe + e ν and \(\chi\to e^{+}\nu \mu(\to\nu_{\mu}e\bar{\nu}_{e})\), the sneutrino-mediated effects could simultaneously account for the Fermi and PAMELA data.

Keywords

Dark Matter Dark Matter Annihilation Bilinear Term Slepton Mass Light SUSY Particle 

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Copyright information

© Springer-Verlag / Società Italiana di Fisica 2010

Authors and Affiliations

  • Chuan-Hung Chen
    • 1
  • Chao-Qiang Geng
    • 2
  • Dmitry V. Zhuridov
    • 3
  1. 1.Department of PhysicsNational Cheng-Kung UniversityTainanTaiwan
  2. 2.National Center for Theoretical SciencesHsinchuTaiwan
  3. 3.Department of PhysicsNational Tsing-Hua UniversityHsinchuTaiwan

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