$e^+e^-\to\gamma\gamma^*$ at two loops in massless QED

descriptionPublicationkeyboard_double_arrow_right Presentation , Other literature type , Article 01 Jan 2023Publisher:ZenodoFunded by:EC | JetDynamics

Authors: Moodie, Ryan;

doi: 10.5281/zenodo.8019968 , 10.5281/zenodo.8019969

$e^+e^-\to\gamma\gamma^*$ at two loops in massless QED

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Abstract

We present an analytic computation of $e^+e^-\to\gamma\gamma^*$ at two loops in massless QED. We reconstruct the analytic form of the amplitudes from numerical evaluations over finite fields. We express the integrals in a basis of Goncharov polylogarithms to obtain compact expressions. These contributions are required for N$^3$LO predictions of the process $e^+e^-\to\gamma^*$ and for NNLO corrections for ISR measurements of $e^+e^-\to\gamma\gamma^*$.

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University of Turin
Italy

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