期刊
PHYSICAL REVIEW D
卷 80, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.80.054019
关键词
-
资金
- DFG [FA67/31-1, FA67/31-2, GRK683]
- European Community-Research Infrastructure Integrating Activity [227431]
- President Grant of Russia [871.2008.2]
We report on further evidence that the Y(3940) and the recently observed Y(4140) are heavy hadron molecule states with quantum numbers J(PC) = 0(++). The Y(3940) state is considered to be a superposition of D*D+*(-) and D*(0)(D*(0)) over bar, while the Y(4140) is a bound state of D-s*(+) and D-s*(-) mesons. For the first time we give predictions for the strong Y(3940) -> J/psi omega, Y(4140) -> J/psi phi and radiative Y(3940)/Y(4140) -> gamma gamma decay widths in a phenomenological Lagrangian approach. Results for the strong J/psi V (V = omega, phi) decays clearly support the molecular interpretation of the Y(3940) and Y(4140). The alternative assignment of J(PC) = 2(++) is also tested, giving similar results for the strong decay widths.
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