Fermionic corrections to quark and gluon form factors in four-loop QCD

Fermionic corrections to quark and gluon form factors in four-loop QCD

We analytically compute all four-loop QCD corrections to the photon-quark and Higgs-gluon form factors involving a closed massless fermion loop. Our calculation of nonplanar vertex integrals confirms a previous conjecture for the analytical form of the nonfermionic contributions to the collinear ano...

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Veröffentlicht in:Physical review. D 2021-10, Vol.104 (7), p.1, Article 074008
Hauptverfasser: Lee, Roman N., von Manteuffel, Andreas, Schabinger, Robert M., Smirnov, Alexander V., Smirnov, Vladimir A., Steinhauser, Matthias
Format: Artikel
Sprache:eng
Schlagworte:
Fermions
Form factors
Gluons
Quantum chromodynamics
Quarks
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Zusammenfassung:We analytically compute all four-loop QCD corrections to the photon-quark and Higgs-gluon form factors involving a closed massless fermion loop. Our calculation of nonplanar vertex integrals confirms a previous conjecture for the analytical form of the nonfermionic contributions to the collinear anomalous dimensions of quarks and gluons.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.104.074008