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Author
Date
2022-01-20Type
- Review Article
Abstract
The computation of the emitted radiation by an accelerated external particle can be addressed in a gauge theory with the insertion of a Wilson loop. With the addition of conformal symmetry, this problem is consistently formalized in terms of correlation functions in the presence of the Wilson loop, which are constrained by defect CFI' techniques. In theories with extended supersymmetry, we can also resort to supersymmetric localization on a four-sphere. By using this set of tools, we review the close relation between the Bremsstrahlung function and the stress energy tensor one-point coefficient in abelian theories and in superconformal field theories. After presenting the state of the art for generic CFTs, we mainly focus on the supersymmetric cases. We discuss the differences between the maximally supersymmetric N = 4 case and N = 2 SCFTs, and finally, we review the general and exact result for the emitted radiation in terms of a first-order derivative of the Wilson loop expectation value on a squashed sphere. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000529742Publication status
publishedExternal links
Journal / series
The European Physical Journal PlusVolume
Pages / Article No.
Publisher
SpringerOrganisational unit
03657 - Gaberdiel, Matthias / Gaberdiel, Matthias
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