Sphaleron rate from lattice QCD
Claudio Bonanno, Francesco D'Angelo, Massimo D'Elia, Lorenzo Maio,, Manuel Naviglio
TL;DR
This paper presents a lattice QCD computation of the sphaleron rate using a novel inversion method for Euclidean correlators, with careful continuum and smoothing extrapolations to improve accuracy.
Contribution
It introduces a modified Backus-Gilbert method for correlator inversion and applies it to compute the sphaleron rate from lattice QCD data.
Findings
Successful extraction of sphaleron rate from lattice data
Implementation of controlled continuum extrapolation
Application of a new correlator inversion technique
Abstract
We compute the sphaleron rate on the lattice from the inversion of the Euclidean time correlators of the topological charge density, performing also controlled continuum and zero-smoothing extrapolations. The correlator inversion is performed by means of a recently-proposed modification of the Backus-Gilbert method.
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Taxonomy
TopicsPhysics of Superconductivity and Magnetism · Theoretical and Computational Physics · Quantum Chromodynamics and Particle Interactions