Extensive Air Showers from Ultra High Energy Gluinos

Details Extensive Air Showers from Ultra High Energy Gluinos Extensive Air Showers from Ultra High Energy Gluinos

2001-09-03

arxiv.org/abs/astro-ph/0109026v1

Phys.Rev. D65 (2002) 083004

Astronomy and Astrophysics

Astrophysics

27 pages latex, 13 eps figures

Scientific paper

10.1103/PhysRevD.65.083004

We study the proposal that the cosmic ray primaries above the Greisen-Zatsepin-Kuzmin (GZK) cutoff are gluino-containing hadrons ($\tilde g$-hadrons). We describe the interaction of $\tilde g$-hadrons with nucleons in the framework of the Gribov-Regge approach using a modified version of the hadronic interaction model QGSJET for the generations of Extensive Air Showers (EAS). There are two mass windows marginally allowed for gluinos: $m_{\tilde g}\lsim 3$ GeV and $25\lsim m_{\tilde g}\lsim 35$ GeV. Gluino-containing hadrons corresponding to the second window produce EAS very different from the observed ones. Light $\tilde g$-hadrons corresponding to the first gluino window produce EAS similar to those initiated by protons, and only future detectors can marginally distinguish them. We propose a beam-dump accelerator experiment to search for $\tilde g$-hadrons in this mass window. We emphasize the importance of this experiment: it can discover (or exclude) the light gluino and its role as a cosmic ray primary at ultra high energies.

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