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Few-Body Systems

, 59:53 | Cite as

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

  • Richard F. Lebed
  • Eric S. Swanson
Article
  • 31 Downloads

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.

Notes

Acknowledgements

This work was supported by the National Science Foundation under Grant No. PHY-1403891.

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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of PhysicsArizona State UniversityTempeUSA
  2. 2.Department of Physics and AstronomyUniversity of PittsburghPittsburghUSA

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