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The new resonances Z_{cs}(3985) and Z_{cs}(4003) (almost) fill two tetraquark nonets of broken SU(3)_f

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arxiv 2103.08331 v2 pith:QKXQD5T2 submitted 2021-03-15 hep-ph

Luciano Maiani , Antonio D. Polosa , Veronica Riquer This is my paper · ORCID
classification hep-ph
keywords tetraquarkbrokenresonancesaccommodationalmostbesiiicasedata
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New data from BESIII and LHCb show the existence of resonances with strangeness filling multiplets of the broken SU(3)_f symmetry, with the pattern predicted by the quark model. This is the case of the newly discovered Z_{cs} (3985) and Z_{cs}(4003), which have a natural accommodation in the tetraquark picture, as shown in this note. The quasi-degeneracy between Z_{cs} (3985) and Z_{cs}(4003) reproduces, in the strange sector, the situation observed with X(3872) and Z_c(3900). This represents a significative score in favor of the tetraquark scheme.

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  1. A femtoscopic tale of two $C$-parities: the $Z_c(3900)$ and the isovector partner of the $X(3872)$

    hep-ph 2026-08 conditional novelty 7.0 of 10

    Femtoscopic correlations of charged charm meson pairs mix C-odd and C-even interactions, giving a new experimental probe of the predicted W_c1 state and correcting earlier predictions.

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