2000 character limit reached
Four-loop results for the cusp anomalous dimension
Published 13 Jul 2018 in hep-ph | (1807.05145v2)
Abstract: We review the current status of calculations of the HQET field anomalous dimension and the cusp anomalous dimension. In particular, we give the results at 4 loops for the quartic Casimir contribution, and for the full QED case, up to $\varphi6$ in the small angle expansion. Furthermore, we discuss the leading terms in the anti-parallel lines limit at four loops.
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