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Cosmic ray physics and AUGER latest results

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112<br />

Photon limit<br />

■<br />

Top-down models predict abundant fluxes of UHE photons<br />

SHDM models: decay of superheavy<br />

dark matter accumulated in<br />

Galactic halo<br />

Showers at E = 10 19 eV, θ = 0º :<br />

TD models: supermassive particle<br />

decay from topological defect<br />

interaction or annihilation<br />

■<br />

Photon-induced showers<br />

look very different<br />

Paris, 9 th June 2008 — IDAPPʼs two days 2008 — E. Parizot (APC / Univ. Paris 7)

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