The J/ψΦ decay channel of the Y(4140) Molecular State
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2015-01-01
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Using the QCD sum rule approach we study the Y(4140) state assuming that it can be described by a D* sD* s molecular state with JPC = 0++ quantum numbers. We evaluate the decay width into the channel Y J/ψΦ and we find the value ΓY→ J/ψΦ≃ (0.34 ± 0.11) MeV, which is much smaller than the total experimental width Γ ≃ (20 ± 8) MeV. However, considering the experimental upper limits for the decay of the Y(4140) into di-photons, Γ γγ×Β[ΓY→J/ψΦ]> 41 eV, such a scalar molecule can be a good candidate to explain the possible exotic structure of the Y(4140) state. © 2016.
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Exotic mesons and heavy quarkonia, Molecular states, QCD spectral sum rules
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Nuclear and Particle Physics Proceedings, v. 258-259, p. 148-151.