Abstract
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 language | English |
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Title of host publication | Hadron 2009 - Proceedings of the XIII International Conference on Hadron Spectroscopy |
Pages | 432-436 |
Number of pages | 5 |
Volume | 1257 |
DOIs | |
Publication status | Published - 2010 |
Externally published | Yes |
Event | 13th International Conference on Hadron Spectroscopy, Hadron 2009 - Tallahassee, FL, United States Duration: 29 Nov 2009 → 4 Dec 2009 |
Conference
Conference | 13th International Conference on Hadron Spectroscopy, Hadron 2009 |
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Country | United States |
City | Tallahassee, FL |
Period | 29.11.09 → 4.12.09 |
Keywords
- Charm mesons
- Hadronic molecule
- Strong and radiative decay
ASJC Scopus subject areas
- Physics and Astronomy(all)