Rapidity evolution of Wilson lines at the next-to-leading order

Understand

At high energies particles move very fast so the proper degrees of freedom for the fast gluons moving along the straight lines are Wilson-line operators - infinite gauge factors ordered along the line.

• In the framework of operator expansion in Wilson lines the energy dependence of the amplitudes is determined by the rapidity evolution of Wilson lines.
• We present the next-to-leading order hierarchy of the evolution equations for Wilson-line operators.