Studying the gradient flow coupling in the Schr\"odinger functional
Patrick Fritzsch, Alberto Ramos
TL;DR
This paper introduces a new definition of the running coupling in the Schrödinger functional scheme using gradient flow, demonstrating its effectiveness for precise continuum limit calculations in QCD with Nf=2 on specific gauge field ensembles.
Contribution
It proposes a novel approach to defining the running coupling in the Schrödinger functional scheme utilizing gradient flow, enhancing continuum limit precision in QCD.
Findings
Effective continuum limit demonstrated for Nf=2 ensembles
Suitable for precise QCD coupling calculations
New definition improves scheme robustness
Abstract
We discuss the setup and features of a new definition of the running coupling in the Schr\"odinger functional scheme based on the gradient flow. Its suitability for a precise continuum limit in QCD is demonstrated on a set of Nf=2 gauge field ensembles in a physical volume of L~0.4fm.
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