Heavy-Quark Hybrid Mass Splittings: Hyperfine and “Ultrafine”

Richard Lebed, Eric S. Swanson

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


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.

Original languageEnglish (US)
Article number53
JournalFew-Body Systems
Issue number4
StatePublished - Jul 1 2018

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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