| Article | |
| Report number | arXiv:2112.11098 ; CERN-TH-2021-225 |
| Title | Disentangling the Regge cut and Regge pole in perturbative QCD |
| Author(s) | Falcioni, Giulio (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Gardi, Einan (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Maher, Niamh (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Milloy, Calum (INFN, Turin ; Turin U.) ; Vernazza, Leonardo (INFN, Turin ; Turin U. ; CERN) |
| Publication | 2022-03-30 |
| Imprint | 2021-12-21 |
| Number of pages | 7 |
| Note | 7 pages, 2 figures; v2: comments regarding the supersymmetric case added, to appear in Phys. Rev. Lett; v3: added ancillary file |
| In: | Phys. Rev. Lett. 128 (2022) 132001 |
| DOI | 10.1103/PhysRevLett.128.132001 (publication) |
| Subject category | hep-th ; Particle Physics - Theory ; hep-ph ; Particle Physics - Phenomenology |
| Abstract | 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. |
| Copyright/License | preprint: (License: arXiv nonexclusive-distrib 1.0) publication: © 2022-2025 authors (License: CC BY 4.0), sponsored by SCOAP³ |
Corresponding record in: Inspire
Record created 2021-12-23, last modified 2023-10-04
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