TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysProc.7.005
TI  - On the discrepancy between the FOPT and CIPT approaches for hadronic tau spectral function moments
PY  - 2022/06/20
UR  - https://scipost.org/SciPostPhysProc.7.005
JF  - SciPost Physics Proceedings
JA  - SciPost Phys. Proc.
VL  - 
IS  - 7
SP  - 005
A1  - Hoang, André
AU  - Regner, Christoph
AB  - 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 that 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 the FOPT and CIPT Borel representations and show numerical results.
ER  -

@Article{10.21468/SciPostPhysProc.7.005,
	title={{On the discrepancy between the FOPT and CIPT approaches for hadronic tau spectral function moments}},
	author={Andre H. Hoang and Christoph Regner},
	journal={SciPost Phys. Proc.},
	pages={005},
	year={2022},
	publisher={SciPost},
	doi={10.21468/SciPostPhysProc.7.005},
	url={https://scipost.org/10.21468/SciPostPhysProc.7.005},
}