Speaker
Sophie Kollatzsch
(PSI)
Description
Using the McMule framework, we present fully differential predictions for the process $e^+e^- \to \mu^+ \mu^-, \tau^+ \tau^-$ with polarised initial states, including the dominant QED corrections at NNLO. Weak corrections are included at NLO in an effective field theory approach. This calculation is important for a wide range of experiments measuring the $R$ ratio (e.g. Daphne, VEPP, ...) or tau properties (e.g. Belle II). The latter is particularly interesting in the light of a recent proposal to measure the tau's anomalous magnetic moment using production asymmetry.
Primary authors
Sophie Kollatzsch
(PSI)
Yannick Ulrich
(IPPP)
