Georgi, HowardKestin, GregorySajjad, Aqil2016-09-122016Georgi, Howard, Greg Kestin, and Aqil Sajjad. 2016. “Color Fields on the Light-Shell.” J. High Energ. Phys. 2016 (2) (February). doi:10.1007/jhep02(2016)136.1029-8479http://nrs.harvard.edu/urn-3:HUL.InstRepos:28410202We study the classical color radiation from very high energy collisions that produce colored particles. In the extreme high energy limit, the classical color fields are confined to a light-shell expanding at c and are associated with a non-linear σ-model on the 2D light-shell with specific symmetry breaking terms. We argue that the quantum version of this picture exhibits asymptotic freedom and may be a useful starting point for an effective light-shell theory of the structure between the jets at a very high energy collider.en-USJournal Article2016-09-1210.1007/JHEP02(2016)136