Journal
PHYSICAL REVIEW LETTERS
Volume 114, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.114.062006
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Funding
- RFBR [12-02-00106-a]
- Russian Ministry of Education and Science
- DOE [DE-SC0009988]
- Marvin L. Goldberger fund
- Munich Institute for Astro- and Particle Physics (MIAPP) of the DFG cluster of excellence Origin and Structure of the Universe
- French National Agency for Research (ANR) [BLANC-SIMI-4-2011]
- DFG Computational Particle Physics [SFB/TR 9]
- EU networks LHCPhenoNet and HiggsTools [PITN-GA-2010-264564, PITN-GA-2012-316704]
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We present the full analytic result for the three loop angle-dependent cusp anomalous dimension in QCD. With this result, infrared divergences of planar scattering processes with massive particles can be predicted to that order. Moreover, we define a closely related quantity in terms of an effective coupling defined by the lightlike cusp anomalous dimension. We find evidence that this quantity is universal for any gauge theory and use this observation to predict the nonplanar n(f)-dependent terms of the four loop cusp anomalous dimension.
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