Reconciling the FOPT and CIPT Predictions for the Hadronic Tau Decay Rate

Author(s)
Miguel Angel Benitez-Rathgeb, Diogo R. Boito, André H. Hoang, Matthias Jamin
Abstract

In a recent work it was suggested that the discrepancy observed in the perturbation series behavior of the $\tau$ hadronic decay rate determined in the FOPT and CIPT approaches can be explained from a different infrared sensitivity inherent to both methods, assuming that the major source of the discrepancy is the asymptotic behavior of the series related to the gluon condensate renormalon. This implies that the predictions of both methods may be reconciled in infrared subtracted perturbation theory. In this talk we explore this implication concretely in the large-$\beta_0$ approximation, where the perturbation series is known to all orders, using a renormalon-free scheme for the gluon condensate.

Organisation(s)
Particle Physics, Research Platform Erwin Schrödinger International Institute for Mathematics and Physics
External organisation(s)
Scientific Software Center, Instituto Oceanográfico
Journal
SciPost Physics
ISSN
2542-4653
Publication date
2021
Peer reviewed
Yes
Austrian Fields of Science 2012
103034 Particle physics
Portal url
https://ucrisportal.univie.ac.at/en/publications/reconciling-the-fopt-and-cipt-predictions-for-the-hadronic-tau-decay-rate(8cea9e81-f596-42b8-9899-de66c43cf611).html