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VOLUME 70 (1999) | ISSUE 8 | PAGE 483
Ultra-High Energy Cosmic Rays and stable H-dibaryon
PACS: 14.80.-j, 96.40.-z
It is shown that an instanton induced interaction between quarks produces a very deeply bound H-dibaryon with mass below 2íÄÇ, íÑ = 1718 MeV. Therefore the H-dibaryon is predicted to be a stable particle. The reaction of photodisintegration of H-dibaryon to 2ì in during of its penetration into cosmic microwave background will result in a new possible cut-off in the cosmic-ray spectrum. This provides an explanation of ultra-high energy cosmic ray events observed above the GZK cut-off as a result of the strong interaction of high energy H-dibaryons from cosmic rays with nuclei in Earth's atmosphere.