Revisiting the proton mass decomposition
High Energy Physics - Phenomenology
2021-01-04 v2 High Energy Physics - Lattice
Nuclear Theory
Abstract
Different decompositions (sum rules) for the proton mass have been proposed in the literature. All of them are related to the energy-momentum tensor in quantum chromodynamics. We review and revisit these decompositions by paying special attention to recent developments with regard to the renormalization of the energy-momentum tensor. The connection between the sum rules is discussed as well. We present numerical results for the various terms of the mass decompositions up to 3 loops in the strong coupling, and consider their scheme dependence. We also elaborate on the role played by the trace anomaly and the sigma terms.
Cite
@article{arxiv.2006.11171,
title = {Revisiting the proton mass decomposition},
author = {Andreas Metz and Barbara Pasquini and Simone Rodini},
journal= {arXiv preprint arXiv:2006.11171},
year = {2021}
}
Comments
28 pages; V2: some discussion added, matches PRD version