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Possible Molecular Explanation for the Resonance \(\varvec{Y}\) (4500)

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Abstract

The BESIII collaboration has discovered a new state with hidden charm-strange. Its mass is intriguingly close to the \( D_s(1968) {\bar{D}}_{s1}(2536) \) threshold and does not have the properties of the charmonium states. Working with the QCD sum rules (QCDSR) approach, we test if the charmonium-like structure Y(4500) , detected in the invariant mass spectrum \( K^+ K^-J/\psi \) may be interpreted as an exotic \( D_s(1968) {\bar{D}}_{s1}(2536) \) molecular structure with \( J^{PC}=1^{--} \). Considering the contributions of QCD condensates up to operator dimension ten, we estimate the mass and decay constant of Y(4500) resonance. We get \( m_Y = (4488.35 \pm 11.54) \) MeV in excellent agreement with the meson mass reported by BESIII and \( f_Y=(4.04 \pm 0.36)\times 10^{-3} \) \( \mathrm {GeV^4} \). Our findings indicate that a pseudoscalar-axialvector molecule current can well describe this state.

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Author notes

  1. E. Güngör, H. Sundu, J. Y. Süngü and E. V. Veliev are contributed equally to this work.

Authors and Affiliations

  1. Department of Physics, Kocaeli University, Umuttepe Yerleşkesi, 41001, Izmit, Türkiye

    E. Güngör, H. Sundu, J. Y. Süngü & E. V. Veliev

  2. Department of Physics Engineering, Istanbul Medeniyet University, 34700, Istanbul, Türkiye

    H. Sundu

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  1. E. Güngör
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  2. H. Sundu
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  3. J. Y. Süngü
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  4. E. V. Veliev
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Correspondence to J. Y. Süngü.

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Güngör, E., Sundu, H., Y. Süngü, J. et al. Possible Molecular Explanation for the Resonance \(\varvec{Y}\) (4500). Few-Body Syst 64, 53 (2023). https://doi.org/10.1007/s00601-023-01807-y

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  • DOI: https://doi.org/10.1007/s00601-023-01807-y

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