ABJM $\theta$-Bremsstrahlung at four loops and beyond

Abstract

In ABJ(M) theory a generalized cusp can be constructed out of the 1/6 BPS Wilson line by introducing an angle $\phi$ in the spacial contour and/or an angle $\theta$ in the internal R-symmetry space. The small angles limits of its anomalous dimension are controlled by corresponding Bremsstrahlung functions. In this note we compute the internal space $\theta$-Bremsstrahlung function to four loops at weak coupling in the planar limit. Based on this result, we propose an all order conjecture for the $\theta$-Bremsstrahlung function.

40 pages; v2: references added, JHEP published extended version

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Cited by in corpus (1)

• Four-loop QCD cusp anomalous dimension at small angle