The 34th International Symposium on Lattice Field Theory (Lattice 2016)

The Nf=3 gradient flow coupling running from 4GeV to 200MeV

25 Jul 2016, 17:05

20m

Building 67 Room 1007 (Highfield Campus, University of Southampton)

Talk Standard Model Parameters and Renormalization Standard Model Parameters and Renormalization

Speaker

Dr Alberto Ramos (CERN)

Description

A fundamental step in the ALPHA collaboration efforts to determine the fundamental parameters of $N_f=3$ QCD at the electroweak scale in terms of hadronic quantities is the connection of an intermediate scale $\sim 4\mathrm{G}\mathrm{e}\mathrm{V}$ with a hadronic scale. In this talk we will show that using the Gradient Flow running coupling this task can be achieved with a very high precision. Our analysis will pay special attention to the continuum limit of flow quantities and reach a precision below 2% in the scale factor for a change of the coupling from $g^2=13$ to $g^2=2.5$.

Presentation materials

Slides

lat16.pdf