Role of the h1(1800) and f1(1285) states in the J/ψ decays
J.J. Xie*, M. Albaladej and E. Oset
*: corresponding author
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Pre-published on: February 16, 2018
Published on: March 20, 2018
Abstract
The BES data on the J/ψηK0ˉK0 reaction show a clear enhancement in the K0ˉK0 mass distribution close to the threshold of this channel. Such an enhancement is usually a signature of a resonance around threshold, which in this case would correspond to an h1 state with quantum numbers IG(JPC)=0(1+). This state around 1800 MeV is studied from the interaction of the K0ˉK0 in J/ψηK0ˉK0 decay, confirming the relationship of the enhancement in the invariant mass spectrum with the h1 resonance. The role of f1(1285) resonance in the J/ψϕˉKK and J/ψϕf1(1285) decays are also investigated. The theoretical approach is based on the results of chiral unitary theory where the f1(1285) resonance is dynamically generated from the ˉKK interaction. In order to further test the dynamical nature of the f1(1285) state, we investigate the J/ψϕˉKK decay close to the ˉKK threshold and make predictions for the ratio of the invariant mass distributions of the J/ψϕˉKK decay and the J/ψϕf1(1285) partial decay width with all the parameters of the mechanism fixed in previous studies. The results can be tested in future experiments and therefore offer new clues on the nature of the h1(1800) and f1(1285) states.
DOI: https://doi.org/10.22323/1.310.0098
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