Shigeru's Homepage

--The Elite of the Universe --

The Standard Scenario

The GZK Mechanism

• The GZK effect
• The Thermal History of the Universe
• The Collisions with the 3K photons
• Attenuation by the 3K photons
• Energy Dispersion by the GZK Mechanism
• Modification of the Spectral Shape
• Neutrino Production by the GZK Mechanism
• The GZK Neutrino Spectrum
• Summary

The Observation by AGASA

Beyond the GZK Mechanism

• Back to Virgo Cluster?
• Neutrinos Rule?
• The Top Down Scenario

syoshida@hepburn.s.chiba-u.ac.jp