Author:
Del Duca Vittorio,Duhr Claude,Dulat Falko,Penante Brenda
Abstract
Abstract
We introduce a method to extract the symbol of the coefficient of (2πi)2 of MHV remainder functions in planar
$$ \mathcal{N} $$
N
= 4 Super Yang-Mills in multi-Regge kinematics region directly from the symbol in full kinematics. At two loops this symbol can be uplifted to the full function in a unique way, without any beyond-the-symbol ambiguities. We can therefore determine all two-loop MHV amplitudes at function level in all kinematic regions with different energy signs in multi-Regge kinematics. We analyse our results and we observe that they are consistent with the hypothesis of a contribution from the exchange of a three-Reggeon composite state starting from two loops and eight points in certain kinematic regions.
Publisher
Springer Science and Business Media LLC
Subject
Nuclear and High Energy Physics
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