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arxiv: 1011.2815 · v1 · pith:4KCZQFMWnew · submitted 2010-11-12 · ✦ hep-ph · hep-ex

Could Y_(b)(10890) be the P-wave [bq][bar{b}bar{q}] tetraquark state?

classification ✦ hep-ph hep-ex
keywords p-wavetetraquarkexperimentalmassresultstateagreesassuming
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Assuming $Y_{b}(10890)$ as a P-wave $bq$-scalar-diquark $\bar{b}\bar{q}$-scalar-antidiquark tetraquark state, the mass of $Y_{b}(10890)$ is computed in the framework of QCD sum rule method. Technically, contributions of operators up to dimension six are included in the operator product expansion (OPE). The numerical result $10.88\pm0.13 GeV$ for $Y_{b}(10890)$ agrees well with the experimental value, which favors the P-wave $[bq][\bar{b}\bar{q}]$ tetraquark configuration for $Y_{b}(10890)$. In the same picture, the mass of $Y(4360)$ is calculated and the result $4.32\pm0.20 GeV$ is compatible with the experimental data, which supports $Y(4360)$'s P-wave $[cq][\bar{c}\bar{q}]$ structure.

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