Hunting for exotic doubly hidden-charm/bottom tetraquark states

By Wei Chen, Hua-Xing Chen, Xiang Liu, T. Steele, Shi-Lin Zhu. 2016

169 citations recorded by the source corpus.

Abstract We develop a moment QCD sum rule method augmented by fundamental inequalities to study the existence of exotic doubly hidden-charm/bottom tetraquark states made of four heavy quarks. Using the compact diquark–antidiquark configuration, we calculate the mass spectra of these tetraquark states. There are 18 hidden-charm c c c ¯ c ¯ tetraquark currents with J P C = 0 + + , 0 − + , 0 − − , 1 + + , 1 + − , 1 − + , 1 − − , and 2 + + . We use them to perform QCD sum rule analyses, and the obtained masses are all higher than the spontaneous dissociation thresholds of two charmonium mesons, which are thus their dominant decay modes. The masses of the corresponding hidden-bottom b b b ¯ b ¯ tetraquarks are all below or very close to the thresholds of the ϒ ( 1 S ) ϒ ( 1 S ) and η b ( 1 S ) η b ( 1 S ) , except one current of J P C = 0 + + . Hence, we suggest to search for the doubly hidden-charm states in the J / ψ J / ψ and η c ( 1 S ) η c ( 1 S ) channels.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/bb925491c2fdb493addf030da3d26d2335c0c50e

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In Nuclear and High Energy Physics

1. T. Blake
2. Simone Bifani
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4. Vladimir Vava Gligorov
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Citations in the corpus

• Physics case for an LHCb Upgrade II - Opportunities in flavour physics, and beyond, in the HL-LHC era (2018, background): “Recently there have been several predictions for an exotic state with quark composition bbbb [506–516] with a mass below, the 2mηb threshold, which implies that it can decay to Υμ+μ−.”