
doi: 10.32388/pplmwv
The recently proposed Zcs(4000)+ and Zcs(4220)+ structures are investigated using a first-order tetraquark mass formula. This mass relationship is based on weakly bound J/Ψ(c c-bar) + K+ (u s-bar) meson clusters and their excited states. The first-order tetraquark mass formula provides a reasonable prediction (within 8%) of the measured masses.
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