On the Discrepancy between the FOPT and CIPT Approaches for Hadronic Tau Spectral Function Moments

Autor(en)

Andre H. Hoang, Christoph Regner

Abstrakt

The discrepancy between the FOPT and CIPT approaches for hadronic $\tau$ spectral function moments constitutes the major theoretical uncertainty for strong coupling determinations from tau decay data. We show the discrepancy can be analytically understood since the Borel representations -- which have been assumed to be identical for both approaches previously -- differ in the presence of IR renormalons. This implies that the OPE condensate corrections are different for both approaches and that the discrepancy may eventually be reconciled. In the talk we explain the difference and some mathematical aspects of of the FOPT and CIPT Borel representations and show numerical results.

Organisation(en)

Teilchenphysik, Forschungsplattform Internationales Erwin Schrödinger Institut für Mathematik und Physik

Journal

SciPost Physics

Band

7

Anzahl der Seiten

14

ISSN

2542-4653

DOI

https://doi.org/10.48550/arXiv.2111.00252

Publikationsdatum

10-2021

Peer-reviewed

Ja

ÖFOS 2012

103012 Hochenergiephysik, 103034 Teilchenphysik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/f3b2a7b0-d479-4043-8d7f-c663aac21466