Light double-gluon hybrid states from QCD sum rules

Abstract

We study the double-gluon hybrid states with the quark-gluon contents $\bar{q}qgg$ ($q=u/d$) and $\bar{s}sgg$. We construct twelve double-gluon hybrid currents with various quantum numbers, five of which are found to be zero due to some internal symmetries between the two gluon fields. We use the rest seven currents to perform QCD sum rule analyses. Especially, the masses of the double-gluon hybrid states with the exotic quantum number $J^{PC}=2^{+-}$ are calculated to be $M_{|\bar{q}qgg;2^{+-}⟩}=2.26_{-0.25}^{+0.20}$ GeV and $M_{|\bar{s}sgg;2^{+-}⟩}=2.38_{-0.25}^{+0.19}$ GeV. Their two- and three-meson decay patterns are also investigated.

arXiv comment12 pages, 6 figures, 2 tables, revised version to be published in PRD

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• Mass predictions of triply heavy hybrid baryons via QCD sum rules
• Fully-strange tetraquark states with the exotic quantum numbers $J^{PC}=0^{+-}$ and $2^{+-}$
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• Double-gluon charmonium hybrid states with various (exotic) quantum numbers
• Light tetraquark states with exotic quantum numbers $J^{PC}=2^{+-}$
• Revisit the heavy quarkonium double-gluon hybrid mesons with exotic quantum numbers
• Baryons and baryoniums in the perspective of QCD sum rules
• Towards heavy double-gluon hybrid mesons with exotic quantum numbers in QCD sum rules