Studying the gradient flow coupling in the Schrödinger functional

Abstract

We discuss the setup and features of a new definition of the running coupling in the Schrödinger 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.

Comments: 7 pages, 3 figures. Talk presented at 31st International Symposium on Lattice Field Theory, July 29 - August 3, 2013, Mainz, Germany