Possible hadronic molecule structure of the Y(3940) and Y(4140)

Tanja Branz, Thomas Gutsche, Valery E. Lyubovitskij

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)


In the present article we report on evidence for hadronic molecule structures in the charmonium sector. In particular we discuss the Y(3940) and the recently observed Y(4140) as heavy hadron molecule states with quantum numbers JPC =0++ or 2++. The Y(3940) state is considered to be a superposition of D*+D*- and D*0D*0, while the Y(4140) is a bound state of D s *+ and D s *- mesons. We give predictions for both the strong Y(3940) rarr; J/Ψω, Y(4140) → J/Ψφ and radiative Y(3940)/Y(4140)→γ γ decay widths in a phenomenological Lagrangian approach. The results for the strong hidden charm decay modes clearly support the molecular interpretation of the Y(3940) and Y(4140), while our estimates for the radiative decays provide a sensitive test for the underlying meson structure of the two Y mesons discussed here. The alternative assignment of JPC = 2++ is also tested, giving similar results for the strong decay widths.

Original languageEnglish
Title of host publicationHadron 2009 - Proceedings of the XIII International Conference on Hadron Spectroscopy
Number of pages5
Publication statusPublished - 2010
Externally publishedYes
Event13th International Conference on Hadron Spectroscopy, Hadron 2009 - Tallahassee, FL, United States
Duration: 29 Nov 20094 Dec 2009


Conference13th International Conference on Hadron Spectroscopy, Hadron 2009
CountryUnited States
CityTallahassee, FL


  • Charm mesons
  • Hadronic molecule
  • Strong and radiative decay

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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