6533b82afe1ef96bd128ba65

RESEARCH PRODUCT

Two-Loop Vertices in Quantum Field Theory: Infrared Convergent Scalar Configurations

Andrea FerrogliaAndrea FerrogliaSandro UcciratiGiampiero PassarinoM. PasseraM. PasseraM. Passera

subject

PhysicsNuclear and High Energy PhysicsLoop (graph theory)Wave function renormalizationScalar (physics)Vertex functionFOS: Physical sciencesTheoretical physicssymbols.namesakeHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)Quantum mechanicsBibliographysymbolsFeynman diagramTensorQuantum field theory

description

A comprehensive study is performed of general massive, scalar, two-loop Feynman diagrams with three external legs. Algorithms for their numerical evaluation are introduced and discussed, numerical results are shown for all different topologies, and comparisons with analytical results, whenever available, are performed. An internal cross-check, based on alternative procedures, is also applied. The analysis of infrared divergent configurations, as well as the treatment of tensor integrals, will be discussed in two forthcoming papers.

yearjournalcountryeditionlanguage
2003-11-14
10.1016/j.nuclphysb.2003.12.016http://hdl.handle.net/2318/100271