TY  - EJOUR
AU  - Bargheer, Till
AU  - Papathanasiou, Georgios
AU  - Schomerus, Volker
TI  - The Two-Loop Symbol of all Multi-Regge Regions
IS  - DESY-15-257
M1  - PUBDB-2016-00074
M1  - DESY-15-257
M1  - arXiv:1512.07620
PY  - 2015
AB  - We study the symbol of the two-loop n-gluon MHV amplitude for all Mandelstam regions in multi-Regge kinematics in N=4 super Yang-Mills theory. While the number of distinct Mandelstam regions grows exponentially with n, the increase of independent symbols turns out to be merely quadratic. We uncover how to construct the symbols for any number of external gluons from just two building blocks which are naturally associated with the six- and seven-gluon amplitude, respectively. The second building block is entirely new, and in addition to its symbol, we also construct a prototype function that correctly reproduces all terms of maximal functional transcendentality.
KW  - supersymmetry: 4 (autogen)
KW  - kinematics: multi-Regge (autogen)
KW  - buildings (autogen)
KW  - maximally helicity violating amplitude (autogen)
KW  - gluon (autogen)
LB  - PUB:(DE-HGF)25 ; PUB:(DE-HGF)29
DO  - DOI:10.3204/PUBDB-2016-00074
UR  - https://bib-pubdb1.desy.de/record/292827
ER  -