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- W4318144466 abstract "The parametric error on the QCD-coupling can be a dominant source of uncertainty in several important observables. One way to extract the coupling is to compare high order perturbative computations with lattice evaluated moments of heavy quark two-point functions. The truncation of the perturbative series is a sizable systematic uncertainty that needs to be under control. In this contribution we give an update on our study arXiv:hep-lat/2203.07936v1 on this issue. We measure pseudo-scalar two-point functions in volumes of $L=2$ fm with twisted-mass Wilson fermions in the quenched approximation. We use full twist, the non-perturbative clover term and lattice spacings down to $a=0.010$ fm to tame the large discretization effects. Our results show that both the continuum extrapolations and the extrapolation of the $Lambda$-parameter to the asymptotic perturbative region are very challenging." @default.
- W4318144466 created "2023-01-26" @default.
- W4318144466 creator A5084932674 @default.
- W4318144466 date "2023-01-24" @default.
- W4318144466 modified "2023-09-27" @default.
- W4318144466 title "A Quenched Exploration of Heavy Quark Moments and their Perturbative Expansion" @default.
- W4318144466 doi "https://doi.org/10.48550/arxiv.2301.09959" @default.
- W4318144466 hasPublicationYear "2023" @default.
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