What's the most high-energy photon or particle discovered? Where are we in that?


by questionpost
Tags: discovered, highenergy, particle, photon
questionpost
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#1
Feb4-12, 03:44 PM
P: 198
I googled it and got some particles with 510^19eV- 3.6910^25eV-, but I know I've heard bigger somewhere else...
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Astronuc
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Feb5-12, 06:46 AM
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I googled it and got some particles with 510^19eV- 3.6910^25eV-, but I know I've heard bigger somewhere else...
From where did one find those numbers. The number 510^19eV is frequently given in reference to the 'GZK cutoff' or 'GZK limit'.
http://en.wikipedia.org/wiki/Greisen...93Kuzmin_limit

There are some indications of particle energies in the 1020 eV range.
http://en.wikipedia.org/wiki/Ultra-h...rgy_cosmic_ray

One should review the following (and search for reliable information on Ultrahigh energy cosmis rays, or UHECR):
http://www.telescopearray.org/outreach/uhecr.html

http://arxiv.org/abs/1011.1872

http://www.slac.stanford.edu/econf/C...apers/L020.PDF

http://www.astro.ucla.edu/~rene/talk...ng-Writeup.pdf

http://uhecr.uchicago.edu/depot/uhecr-wp.pdf

http://canopus.chungnam.ac.kr/kaw3/0...p421_jones.pdf


In terrestrial proton accelerators (synchrotrons), we get particles into the TeV (1012 eV) range, but not quite to 1013 eV.
questionpost
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#3
Feb5-12, 10:37 AM
P: 198
I was thinking more around *10^27 and beyond...


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