Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8185904 | Nuclear Physics B - Proceedings Supplements | 2010 | 6 Pages |
Abstract
Infrared divergences of QCD scattering amplitudes can be derived from an anomalous dimension matrix, which is also an essential ingredient for the resummation of large logarithms due to soft gluon emissions. We report a recent analytical calculation of the anomalous dimension matrix with both massless and massive partons at two-loop level, which describes the two-loop infrared singularities of any scattering amplitudes with an arbitrary number of massless and massive partons, and also enables soft gluon resummation at next-to-next-to-leading-logarithmic order. As an application, we calculate the infrared poles in the qq¯âtt¯ and ggâtt¯ scattering amplitudes at two-loop order.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Andrea Ferroglia, Matthias Neubert, Ben D. Pecjak, Li Lin Yang,