TY  - EJOUR
AU  - Bargheer, Till
TI  - Systematics of the Multi-Regge Three-Loop Symbol
IS  - DESY-16-115
M1  - PUBDB-2016-02553
M1  - DESY-16-115
M1  - arXiv:1606.07640
PY  - 2016
AB  - We review the systematics of Mandelstam cut contributions to planar scattering amplitudes in the multi-Regge limit. Isolating the relevant cut terms, we explain how the BFKL expansion can be used to construct the perturbative n-point MHV multi-Regge limit symbol from a finite number of basic building blocks. At three loops and at leading logarithmic order, two building blocks are required. These are extracted from the known three-loop six-point and seven-point symbols for general kinematics. The subleading and sub-subleading terms require two and one further building block, respectively. The latter could either be reconstructed from further perturbative data, or from BFKL integrals involving yet-unknown corrections to the central emission vertex, on whose construction we also briefly comment.
KW  - multi-Regge (autogen)
KW  - buildings (autogen)
KW  - BFKL equation (autogen)
KW  - scattering amplitude (autogen)
KW  - kinematics (autogen)
LB  - PUB:(DE-HGF)25 ; PUB:(DE-HGF)29
DO  - DOI:10.3204/PUBDB-2016-02553
UR  - https://bib-pubdb1.desy.de/record/300996
ER  -