Disentangling the Regge Cut and Regge Pole in Perturbative QCD
| Autor: | Giulio Falcioni, Einan Gardi, Niamh Maher, Calum Milloy, Leonardo Vernazza |
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| Rok vydání: | 2021 |
| Předmět: |
High Energy Physics - Theory
hep-th High Energy Physics::Lattice High Energy Physics::Phenomenology General Physics and Astronomy FOS: Physical sciences hep-ph High Energy Physics - Phenomenology High Energy Physics::Theory General Relativity and Quantum Cosmology High Energy Physics - Phenomenology (hep-ph) High Energy Physics - Theory (hep-th) High Energy Physics::Experiment Particle Physics - Theory Particle Physics - Phenomenology |
| Zdroj: | Physical Review Letters Falcioni, G, Gardi, E, Maher, N, Milloy, C & Vernazza, L 2022, ' Disentangling the Regge Cut and Regge Pole in Perturbative QCD ', Physical Review Letters, vol. 128, no. 13, 132001, pp. 1-7 . https://doi.org/10.1103/PhysRevLett.128.132001 |
| ISSN: | 1079-7114 |
| Popis: | The high-energy limit of gauge-theory amplitudes features both a Regge pole and Regge cuts. We show how to disentangle these, and hence how to determine the Regge trajectory beyond two loops. While the nonplanar part of multiple Reggeon $t$-channel exchange forms a Regge cut, the planar part contributes to the pole along with the single Reggeon. With this, we find that the infrared singularities of the trajectory are given by the cusp anomalous dimension. By matching to recent QCD results, we determine the quark and gluon impact factors to two loops and the Regge trajectory to three loops. Comment: 7 pages, 2 figures; v2: comments regarding the supersymmetric case added, to appear in Phys. Rev. Lett; v3: added ancillary file |
| Databáze: | OpenAIRE |
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