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2012

Infrared singularities in the high-energy limit

Magnea, Lorenzo, Del Duca, Vittorio, Duhr, Claude et al.

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We use our current understanding of the all-order singularity structure of gauge theory amplitudes to probe their high-energy limit.

Our starting point is the dipole formula, a compact ansatz for the soft anomalous dimension matrix of massless multi-particle amplitudes.
In the high-energy limit, we find a simple and general expression for the infrared factor generating all soft and collinear singularities of the amplitude, which is valid to leading power in $|t|/s$ and to all logarithmic orders.
This leads to a direct and general proof of leading-logarithmic Reggeization for infrared divergent contributions to the amplitude.

Infrared singularities in the high-energy limit · Around

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2006

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