Electroweak radiative corrections:Towards a full two-loop analysis

Physics – High Energy Physics – High Energy Physics - Phenomenology

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Presented at the Fifth International Symposium on Radiative Corrections (RADCOR 2000), Carmel, CA, September 11-15, 2000

Scientific paper

In calculating electroweak radiative corrections at two-loop level, one encounters Feynman graphs with several different masses on the internal propagators and on the external legs, which lead to complicated scalar functions. We describe a general analytic-numerical reduction scheme for evaluating any two-loop diagrams with general kinematics and general renormalizable interactions, whereby ten basic functions form a complete set after tensor reduction. We illustrate this scheme by applying it to two- and three-point functions. We discuss the treatment of infrared singularities within this numerical approach.

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