2015/10/30 by Julien Frison, Frison, Julien, Peter Boyle +4
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat
paper · pdf · doi:10.48550/arxiv.1510.09114
Talk presented at the 33rd International Symposium on Lattice Field Theory (Lattice 2015), 14-18 July 2015, Kobe International Conference Center, Kobe, Japan
arxiv created 2015/10/30 · openalex publication_date 2015/10/30 · arxiv updated 2015/11/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
When several four-quark operators are allowed to mix through renormalisation, this can considerably amplify the problems coming from perturbative truncation and discretisation effects. In this work we investigate whether our previous BK strategy can conveniently be generalised to a wider set of operators, corresponding to the so-called "SUSY BK" basis of four-quark operators. We show that the discretisation effects, when plotted as a function of ap, are surprisingly independent of the lattice spacing. They appear reasonably under control up to very large energy scales. This allows us to discuss the effect of varying the intermediate scale on which the perturbative matching is done, and therefore the prospects of future high-precision studies with a Rome-Southampton renormalisation.