https://doi.org/10.1140/epjc/s10052-018-5977-8
Regular Article - Theoretical Physics
Open spin chains and complexity in the high energy limit
Instituto de Física Teórica UAM/CSIC & Universidad Autónoma de Madrid, Nicolás Cabrera 15, 28049, Madrid, Spain
* e-mail: chachamis@gmail.com
Received:
23
January
2018
Accepted:
7
June
2018
Published online:
14
June
2018
In the high energy limit of scattering amplitudes in Quantum Chromodynamics and supersymmetric theories the dominant Feynman diagrams are characterized by a hidden integrability in the planar limit. A well-known example is that of Odderon exchange, which can be described as a composite state of three reggeized gluons and corresponds to a closed spin chain with periodic boundary conditions. In the 
supersymmetric Yang–Mills theory a similar spin chain arises in the multi-Regge asymptotics of the eight-point amplitude in the planar limit. We investigate the associated open spin chain in transverse momentum and rapidity variables solving the corresponding effective Feynman diagrams. We introduce the concept of complexity in the high energy effective field theory and study its emerging scaling laws.
© The Author(s), 2018
