Subleading Regge limit from a soft anomalous dimension
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Publication:1641717
DOI10.1007/JHEP04(2018)047zbMATH Open1390.81622arXiv1802.02524OpenAlexW3105829249WikidataQ129885782 ScholiaQ129885782MaRDI QIDQ1641717
Author name not available (Why is that?)
Publication date: 19 June 2018
Published in: (Search for Journal in Brave)
Abstract: Wilson lines capture important features of scattering amplitudes, for example soft effects relevant for infrared divergences, and the Regge limit. Beyond the leading power approximation, corrections to the eikonal picture have to be taken into account. In this paper, we study such corrections in a model of massive scattering amplitudes in N = 4 super Yang-Mills, in the planar limit, where the mass is generated through a Higgs mechanism. Using known three-loop analytic expressions for the scattering amplitude, we find that the first power suppressed term has a very simple form, equal to a single power law. We propose that its exponent is governed by the anomalous dimension of a Wilson loop with a scalar inserted at the cusp, and we provide perturbative evidence for this proposal. We also analyze other limits of the amplitude and conjecture an exact formula for a total cross-section at high energies.
Full work available at URL: https://arxiv.org/abs/1802.02524
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