Two-loop vertices with vacuum polarization insertion

Taushif Ahmed

doi:10.1007/JHEP01(2024)010

Two-loop vertices with vacuum polarization insertion

2024-01-03

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Federico Gasparotto *

DOI：10.1007/JHEP01(2024)010

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We present the analytic evaluation of the second-order corrections to the massive form factors, due to two-loop vertex diagrams with a vacuum polarization insertion, with exact dependence on the external and internal fermion masses, and on the squared momentum transfer. We consider vector, axial-vector, scalar and pseudoscalar interactions between the external fermion and the external field. After renormalization, the finite expressions of the form factors are expressed in terms of polylogarithms up to weight three.

Keywords:

Higher-Order Perturbative Calculations

Precision QED

Two-loop vertices with vacuum polarization insertion

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