https://doi.org/10.1140/epjc/s10052-018-5910-1
Regular Article - Theoretical Physics
Reggeon cuts in QCD amplitudes with negative signature
1
Budker Institute of Nuclear Physics of SB RAS, Novosibirsk, 630090, Russia
2
Novosibirsk State University, Novosibirsk, 630090, Russia
3
Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg, 188300, Russia
4
St. Petersburg State University, St. Petersburg, 199034, Russia
* e-mail: fadin@inp.nsk.su
Received:
6
April
2018
Accepted:
19
May
2018
Published online:
1
June
2018
Reggeon cuts in QCD amplitudes with negative signature are discussed. These cuts appear in the next-to-next-to-leading logarithmic approximation and greatly complicate the derivation of the BFKL equation. Feynman diagrams responsible for appearance of these cuts are indicated and the cut contributions are calculated in the two- and three-loop approximations.
© The Author(s), 2018
