Hints for the existence of hexaquark states in the baryon-antibaryon sector

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Abstract
The discovery of some baryon-antibaryon resonances has led us to consider 3q 3q\ifmmode\bar\else\textasciimacron\fi{} systems as possible candidates. We predict their spectrum in the framework of a constituent model, where the chromomagnetic interaction plays the main role. The relevant parameters are fixed by the present knowledge of tetraquarks. The emerging scenario complies well with experiment; besides the description of the baryon-antibaryon resonances, we find evidence for new tetraquark states, namely, the a0(Y) in the hidden strangeness sector and the Y(4140) and X(4350) in the cscs\ifmmode\bar\else\textasciimacron\fi{} sector. A detailed account of the spectra and the decay channels is provided for future comparisons with data.
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