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Axial vector tetraquark with S=+2

Y. Kanada-En'yo·O. Morimatsu·T. Nishikawa
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Abstract

Possibility of an axial vector isoscalar tetraquark with $ud\bar{s}\bar{s}$ is discussed. If the pentaquark $Θ^+(1540)$ has the $(qq)_{\bar{3}}(qq)_{\bar{3}}\bar{q}$ configuration, the isoscalar $ud\bar{s}\bar{s}$($\vartheta^+$-meson) state with $J^P=1^+$ is expected to exist in the mass region lower than or close to the mass of $Θ^+(1540)$. Within a flux-tube quark model, a possible resonant state of $ud\bar{s}\bar{s}(J^{P}=1^{+})$ is suggested to appear around 1.4 GeV with the width ${\cal{O}}(20\sim 50)$ MeV. We propose that the $\vartheta^+$-meson is a good candidate for the tetraquark search, which would be observed in the $K^+K^+π^-$ decay channel.

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Y. Kanada-En'yo, O. Morimatsu, T. Nishikawa. 2005-08-24. Axial vector tetraquark with S=+2. https://doi.org/10.1103/physrevd.71.094005

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