Exotic resonances due to η exchange

Marek Karliner*, Jonathan L. Rosner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The meson X(3872) and several related states appear to be in large part hadronic molecules in which a heavy flavored meson (e.g., D0) is bound to another heavy meson (e.g., D¯⁎0). Although not the only contribution to the binding, pion exchange seems to play a crucial role in generating the longest-range force between constituents. Mesons without u and d light quarks (such as Ds) cannot exchange pions, but under suitable conditions can bind as a result of η exchange. Channels in which this mechanism is possible are identified, and suggestions are made for searches for the corresponding molecular states, including a manifestly exotic baryonic Λcs resonance decaying into J/ψΛ.

Original languageEnglish
Pages (from-to)365-370
Number of pages6
JournalNuclear Physics A
StatePublished - 1 Oct 2016


  • Exotic hadrons
  • Heavy quarks
  • QCD
  • Quark model


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