Emitted Radiation and Geometry

Abstract

In conformal $\mathcal{N}=2$ Super Yang-Mills theory, the energy emitted by an accelerated heavy particle is computed by the one-point function of the stress tensor operator in the presence of a Wilson line. In this paper, we consider the theory on the ellipsoid and we prove a conjectured relation between the stress tensor one-point function and the first order expansion of the Wilson loop expectation value in the squashing parameter. To do this, we analyze the behavior of the Wilson loop for a small deformation of the background geometry and, at first order in the deformation, we fix the kinematics using defect CFT constraints. In the final part of the paper, we analyze the consequences of our results for the weak coupling perturbative expansion. In particular, comparing the weakly coupled matrix model with the ordinary Feynman diagram expansion, we find a natural transcendentality driven organization for the latter.

39 pages, 5 figures, 1 table

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Cited by in corpus (7)

• Renormalization Group Flows on Line Defects
• Superconformal surfaces in four dimensions
• N=2 Conformal SYM theories at large N
• Analytic bootstrap and Witten diagrams for the ABJM Wilson line as defect CFT${}_1$
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• Conformal field theories on deformed spheres, anomalies, and supersymmetry
• Loop Equation and Exact Soft Anomalous Dimension in N=4 Super Yang-Mills