Dispersive Two-Loop Calculations: Methodology and Applications
A. Aleksejevs* and S. Barkanova
November 19, 2019
December 17, 2019
As the new-generation precision experiments such as MOLLER  and P2  look for physics beyond Standard Model, it is becoming increasingly important to evaluate the higher-order electroweak radiative corrections to a sub-percent level of uncertainty. However, due to propagators with different masses and higher-order tensor Feynman integrals, the two-loop calculations involving thousands of Feynman graphs become a demanding task requiring novel computational approaches. In this paper, we describe our dispersive sub-loop insertion approach and develop two-loop integrals using two-point functions basis which is applicable to wide range of processes.
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