Role of the h1(1800) and f1(1285) states in the J/ψ decays
J.J. Xie*,
M. Albaladej and
E. Oset*: corresponding author
Pre-published on:
February 16, 2018
Published on:
March 20, 2018
Abstract
The BES data on the J/ψ→ηK∗0ˉK∗0 reaction show a clear enhancement in the K∗0ˉK∗0 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 K∗0ˉK∗0 in J/ψ→ηK∗0ˉK∗0 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/ψ→ϕˉKK∗ and J/ψ→ϕf1(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/ψ→ϕˉKK∗ decay close to the ˉKK∗ threshold and make predictions for the ratio of the invariant mass distributions of the J/ψ→ϕˉKK∗ decay and the J/ψ→ϕf1(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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