Analysis of the strong decays of the Y(4660) in tetraquark scenario via the QCD sum rules

2025/11/12 by Yang, Xiao-Song, Wang, Zhi-Gang
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2511.09098

Abstract

Motivated by the enigmatic vector charmonium-like states, we investigate the strong decay behaviors of four kinds of tetraquark states, which are possible candidates for the Y(4660), within the framework of three-point QCD sum rules based on rigorous quark-hadron duality. We take into account the vacuum condensates up to dimension 5 in the QCD side, and obtain the hadronic coupling constants therefore the partial decay widths of those states. The predicted width 61.5±7.3 \rmMeV is in excellent agreement with the experimental data for the Y(4660), which supports its interpretation as a [sc][sc] tetraquark state with the J^PC=1^--.

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