Friday, June 26, 2009, 2:00 pm — Small Seminar Room, Bldg. 510
The high-energy behavior of amplitudes in gauge theories can be reformulated in terms of the
evolution of Wilson-line operators. In the leading order this evolution is governed by the non-linear
Balitsky-Kovchegov (BK) equation. The NLO corrections define the scale of the running-coupling
constant in the BK equation and in QCD, its kernel has both conformal and non-conformal parts.
To separate the conformally invariant effects from the running-coupling effects, we calculate the
NLO evolution of the color dipoles in the conformal N = 4 SYM theory, then we define the "composite dipole operator" with the rapidity cutoff preserving conformal invariance, and the resulting Mobius invariant kernel for this operator agrees with the forward NLO BFKL calculation.
In QCD, the NLO kernel for the composite operators resolves in a sum of the conformal part and
the running-coupling part.
Hosted by: Gregory Soyez
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