2025/06/10 by Ö. E. Demircan, Demircan, Ö. E., H. Dağ +7
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2506.08589
openalex publication_date 2025/06/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The LHCb Collaboration recently observed new structures in the invariant mass spectrum of J/ψJ/ψ meson pairs produced in proton-proton collisions, including a narrow peak around 6.2 GeV. This study investigates the thermal behavior of this newly discovered fully-charm resonance, assuming it to be an ηcηc molecule with quantum numbers JPC = 0++. Employing thermal QCD sum rules up to dimension four, we analyze the temperature dependence of the mass and the decay constant. Our results indicate that both physical quantities decrease as the temperature rises. Notably, at zero temperature, the mass and decay constant of the state are consistent with those reported in the existing literature. These findings are expected to provide valuable insights for future experimental investigations in this field.