Analysis of the strong decays of the Y (4660) in tetraquark scenario via the QCD sum rules*
Abstract
Abstract Motivated by the enigmatic vector charmonium-like states, we investigate the strong decay behaviors of four types of vector tetraquark states, which are possible candidates for the , within the framework of three-point QCD sum rules based on rigorous quark-hadron duality. We take into account vacuum condensates up to dimension 5 on the QCD side and obtain the hadronic coupling constants and hence the partial decay widths of these states. The predicted total width, , is in excellent agreement with the experimental data for the , supporting its interpretation as a tetraquark state with .
Fields of Study & Subjects
Quantum Chromodynamics and Particle Interactions
Particle physics theoretical and experimental studies
Nuclear physics research studies
Publication details
- Journal / source
- Chinese Physics C
- Volume
- 50
- Issue
- 9
- Pages
- 093104–093104
- Publication date
- 22 May 2026