Heavy-Quark Hybrid Mass Splittings: Hyperfine and "Ultrafine"
High Energy Physics - Phenomenology
2022-10-19 v2 High Energy Physics - Experiment
Abstract
It is argued that the heavy-quark limit of QCD requires a certain combination of hyperfine mass splittings in heavy-quark hybrid-meson multiplets to be unusually small. This observation will assist in the exploration of the heavy-quark hybrid spectrum at facilities such as PANDA. Alternatively, a large measured value for this mass splitting indicates that at least one member of the multiplet must contain significant light-quark degrees of freedom.
Keywords
Cite
@article{arxiv.1708.02679,
title = {Heavy-Quark Hybrid Mass Splittings: Hyperfine and "Ultrafine"},
author = {Richard F. Lebed and Eric S. Swanson},
journal= {arXiv preprint arXiv:1708.02679},
year = {2022}
}
Comments
Version to appear in Few-Body Systems. Substantial modifications from previous version, including extensive additional references and an expanded discussion of relevant operators. 7 pages