PoS - Proceedings of Science
Volume 367 - XXIX International Symposium on Lepton Photon Interactions at High Energies (LeptonPhoton2019) - Parallel Sessions
Dispersive Two-Loop Calculations: Methodology and Applications
A. Aleksejevs* and S. Barkanova
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Pre-published on: November 19, 2019
Published on: December 17, 2019
As the new-generation precision experiments such as MOLLER [1] and P2 [2] 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.
DOI: https://doi.org/10.22323/1.367.0090
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