Possible Molecular Explanation for the Resonance <i>Y</i> (4500)

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Gungor E., Sundu H., YILMAZKAYA SÜNGÜ J., VELİ E.

FEW-BODY SYSTEMS, cilt.64, sa.3, 2023 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 64 Sayı: 3
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1007/s00601-023-01807-y
  • Dergi Adı: FEW-BODY SYSTEMS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Kocaeli Üniversitesi Adresli: Evet

Özet

The BESIII collaboration has discovered a new state with hidden charm-strange. Its mass is intriguingly close to the D-s(1968) (D) over bar (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) (D) over bar (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 +/- 11.54) MeV in excellent agreement with the meson mass reported by BESIII and f(Y) = (4.04 +/- 0.36) x 10(-3)GeV(4). Our findings indicate that a pseudoscalar-axialvector molecule current can well describe this state.