Hadronic molecules ηcηc and χc0χc0

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Agaev S. S., Azizi K., Barsbay B., Sundu H.

EUROPEAN PHYSICAL JOURNAL PLUS, cilt.138, sa.10, 2023 (SCI-Expanded, Scopus)

• Yayın Türü: Makale / Tam Makale
• Cilt numarası: 138 Sayı: 10
• Basım Tarihi: 2023
• Doi Numarası: 10.1140/epjp/s13360-023-04562-5
• Dergi Adı: EUROPEAN PHYSICAL JOURNAL PLUS
• Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, INSPEC
• Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
• Kocaeli Üniversitesi Adresli: Evet

Özet

The fully charmed hadronic scalar molecules M1=eta c eta c and M2=chi c0 chi c0 are studied in the context of the QCD sum rule method. The masses m, m~ and current couplings f, f~ of these states are calculated using the two-point sum rule approach. The obtained results m=(6264 +/- 50)MeV and m~=(6954 +/- 50)MeV are employed to determine their decay channels. It is demonstrated that the processes M1 -> J/psi J/psi and M1 -> eta c eta c are kinematically allowed decay modes of M1. The molecule M2 decays to J/psi J/psi, J/psi psi ', eta c eta c, eta c eta c(2S), eta c chi c1(1P), and chi c0 chi c0 mesons. The partial widths of all these processes are evaluated by means of the three-point sum rule calculations, which are necessary to extract the strong couplings gi at vertices M1J/psi J/psi, M1 eta c eta c, and others. Our estimates for the full widths of the molecules Gamma M1=(320 +/- 72)MeV and Gamma M2=(138 +/- 18)MeV, as well as their masses are compared with parameters of the X resonances discovered by the LHCb-ATLAS-CMS Collaborations in the di-J/psi and J/psi psi ' invariant mass distributions. We argue that the molecule M1 can be considered as a real candidate to the resonance X(6200). The structure M2 may be interpreted as X(6900) or one of its components in combination with a scalar tetraquark.