Correlator webs of massive multiparton amplitudes at four loops: A study of boomerang webs
arxiv(2023)
摘要
Logarithm of the soft function can be organized into sets of Feynman diagrams
known as Cwebs. We introduced a new formalism in , that
allows to determine several of the building blocks of Cweb mixing matrices
without explicit computations. In we used this formalism
to obtain the diagonal blocks of four general classes of Cwebs to all orders in
perturbation theory which also covered all the four loop Boomerang Cwebs
connecting four Wilson lines. In this work we present complete mixing matrices
and exponentiated colour factors for Boomerang Cwebs at four loops that connect
three and four Wilson lines. Also, we present a more efficient version of the
algorithm of generating Cwebs that was presented in .
This new algorithm has been used to generate the Cwebs in the present work.
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