Crypton (particle)

In particle physics, the crypton is a hypothetical superheavy particle, thought to exist in a hidden sector of string theory. It has been proposed as a candidate particle to explain the dark matter content of the universe. Cryptons arising in the hidden sector of a superstring-derived flipped SU(5) GUT model have been shown to be metastable with a lifetime exceeding the age of the universe. Their slow decays may provide a source for the ultra-high-energy cosmic rays (UHECR).

## References

* John Ellis; Jorge L. Lopez; D.V. Nanopoulos (1990). "Confinement of fractional charges yields integer-charged relics in string models". Physics Letters B 247 (2–3): 257–264. doi:10.1016/0370-2693(90)90893-B. Bibcode: 1990PhLB..247..257E. https://cds.cern.ch/record/209251.
* Karim Benakli; John Ellis; D.V. Nanopoulos (1999). "Natural Candidates for Superheavy Dark Matter in String and M Theory". Physical Review D 59 (4): 047301. doi:10.1103/PhysRevD.59.047301. Bibcode: 1999PhRvD..59d7301B. https://cds.cern.ch/record/348913.
* John Ellis; V.E. Mayes; D.V. Nanopoulos (2004). "Flipped Cryptons and the Ultra-high Energy Cosmic Rays". Physical Review D 70 (7): 075015. doi:10.1103/PhysRevD.70.075015. Bibcode: 2004PhRvD..70g5015E.
* John Ellis; V.E. Mayes; D.V. Nanopoulos (2006). "Ultrahigh Energy Cosmic Ray Particle Spectra from Crypton Decays". Physical Review D 74 (11): 115003. doi:10.1103/PhysRevD.74.115003. Bibcode: 2006PhRvD..74k5003E. https://cds.cern.ch/record/914800.

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