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- URN zum Zitieren dieses Dokuments:
- urn:nbn:de:bvb:355-epub-749873
- DOI zum Zitieren dieses Dokuments:
- 10.5283/epub.74987
Zusammenfassung
The scale evolution of parton distributions is determined by universal splitting functions. As a milestone towards the computation of these functions to four-loop order in QCD, we compute all contributions to the pure-singlet quark-quark splitting functions that involve two closed fermion loops. The splitting functions are extracted from the pole terms of off-shell operator matrix elements, and ...
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