Long-lived neutralino and ultra-high energy cosmic rays

Details Long-lived neutralino and ultra-high energy cosmic rays Long-lived neutralino and ultra-high energy cosmic rays

2002-11-20

arxiv.org/abs/astro-ph/0211461v1

Astronomy and Astrophysics

Astrophysics

7 Latex pages, no figures; based on the talks given by S.T. at Quarks'2002 and SUSY'02 meetings

Scientific paper

Secondary photons from decays of metastable neutralinos can contribute to the ultra-high energy cosmic ray flux. The neutralino production rate is too low in acceleration mechanisms to affect the cosmic ray spectrum without emitting enormous energy in photons and neutrinos. However, in top-down models with sources not concentrated in galactic halos, neutralino decays change the spectrum significantly. We estimate the parameters of a model in which photons from neutralino decays are responsible for cosmic ray events with energies above 10^20 eV, and figure out distinctive experimental signatures for this model.

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