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.
Original language | English |
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Journal | SciPost Physics |
Publication status | Submitted - 2021 |
Event | The 16th International Workshop on Tau Lepton Physics (TAU2021) - Online conference, Unknown Duration: 27 Sept 2021 → 1 Oct 2021 https://indico.cern.ch/event/848732/ |
Austrian Fields of Science 2012
- 103034 Particle physics