Searching for hidden-charm baryonium signals in QCD sum rules

Abstract

We give an explicit QCD sum rule investigation to hidden-charm baryonium states with the quark content $u\bar{u}d\bar{d}c\bar{c}$, spin $J=0/1/2/3$, and of both positive and negative parities. We systematically construct the relevant local hidden-charm baryonium interpolating currents, which can actually couple to various structures, including hidden-charm baryonium states, charmonium states plus two pions, and hidden-charm tetraquark states plus one pion, etc. We do not know which structure these currents couple to at the beginning, but after sum rule analyses we can obtain some information. We find some of them can couple to hidden-charm baryonium states, using which we evaluate the masses of the lowest-lying hidden-charm baryonium states with quantum numbers $J^P=2^{-}/3^{-}/0^{+}/1^{+}/2^{+}$ to be around 5.0 GeV. We suggest to search for hidden-charm baryonium states, especially the one of $J=3^{-}$, in the $D$-wave $J/\psi \pi \pi$ and $P$-wave $J/\psi \rho$ and $J/\psi \omega$ channels in this energy region.

7 pages, 5 figures, 1 table. Accepted by Eur. Phys. J. C

References in corpus (5)

• Heavy quarkonium: progress, puzzles, and opportunities
• Hadronic Molecular States Composed of Heavy Flavor Baryons
• A Uniform Description of the States Recently Observed at B-factories
• A possible global group structure for exotic states
• Chiral Properties of Baryon Fields with Flavor SU(3) Symmetry

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