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 language | English |
|---|---|
| Article number | 054019 |
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 80 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 21 Sep 2009 |
| Externally published | Yes |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
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Branz, T., Gutsche, T., & Lyubovitskij, V. E. (2009). Hadronic molecule structure of the Y(3940) and Y(4140). Physical Review D - Particles, Fields, Gravitation and Cosmology, 80(5), [054019]. https://doi.org/10.1103/PhysRevD.80.054019