期刊
PHYSICAL REVIEW D
卷 99, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.99.096023
关键词
-
资金
- Cluster of Excellence Precision Physics, Fundamental Interactions, and Structure of Matter - German Research Foundation (DFG) within the German Excellence Strategy [PRISMA+EXC 2118/1, 39083149]
Starting from two-loops, there are Feynman integrals with higher powers of the propagators. They arise from self-energy insertions on internal lines. Within the loop-tree duality approach or within methods based on numerical unitarity one needs (among other things) the residue when a raised propagator goes on shell. We show that for renormalized quantities in the on-shell scheme these residues can be made to vanish already at the integrand level.
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