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Four-loop cusp anomalous dimension in QED. https://t.co/1TdPKB8dxf
Four-loop cusp anomalous dimension in QED. https://t.co/1TdPKB8dxf
https://t.co/W2R1qEzKsy A Grozin Four-loop cusp anomalous dimension in QED https://t.co/R1BreKcGnX