Hadronic molecule structure of the Y(3940) and Y(4140)

Tanja Branz, Thomas Gutsche, Valery E. Lyubovitskij

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Abstract

We report on further evidence that the Y(3940) and the recently observed Y(4140) are heavy hadron molecule states with quantum numbers JPC=0++. The Y(3940) state is considered to be a superposition of D*+D*- and D*0D*0̄, while the Y(4140) is a bound state of Ds*+ and Ds*- mesons. For the first time we give predictions for the strong Y(3940)→J/ψω, Y(4140)→J/ψ φ and radiative Y(3940)/Y(4140)→γγ decay widths in a phenomenological Lagrangian approach. Results for the strong J/ψV (V=ω, φ) decays clearly support the molecular interpretation of the Y(3940) and Y(4140). The alternative assignment of JPC=2++ is also tested, giving similar results for the strong decay widths.

Original languageEnglish
Article number054019
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume80
Issue number5
DOIs
Publication statusPublished - 21 Sep 2009
Externally publishedYes

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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