Speaker
Giovanni Antonio Chirilli
(Cpht-Polytechnique & LPT d'Orsay)
Description
To study the scattering amplitudes at the high-energy, the
T-product of two currents can be expanded in terms of coefficient
functions (impact factors) and matrix elements of ``composite color
dipoles'' made of Wilson line with rapidity cutoff preserving conformal
invariance.
In the leading order, the high-energy evolution of color dipoles is governed
by the non-linear Balitsky-Kovchegov (BK) equation. To describe the
high-energy amplitudes in the next-to-leading order (NLO) one needs to
know the coefficient function (``impact factor'') and the evolution of
corresponding Wilson-line operators at NLO. Using the high-energy OPE, we
find the next-to-leading order (NLO) correction to the BK equation and
calculate the impact factor for virtual photons in deep inelastic
scattering.
Primary author
Giovanni Antonio Chirilli
(Cpht-Polytechnique & LPT d'Orsay)
