We compute the sphaleron rate on the lattice. We adopt a novel strategy based on the extraction of the spectral density via a modified version of the Backus-Gilbert method from finite-lattice-spacing and finite-smoothing-radius Euclidean topological charge density correlators. The physical sphaleron rate is computed by performing controlled continuum limit and zero-smoothing extrapolations both in pure gauge and, for the first time, in full QCD.
@article{arxiv.2312.15468,
title = {Sphaleron rate as an inverse problem: a novel lattice approach},
author = {Claudio Bonanno and Francesco D'Angelo and Massimo D'Elia and Lorenzo Maio and Manuel Naviglio},
journal= {arXiv preprint arXiv:2312.15468},
year = {2023}
}