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New narrow LHCb pentaquarks as lowest antiquark-diquark-diquark systems

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arxiv 1911.11994 v2 pith:KDR5VBRX submitted 2019-11-27 hep-ph

classification hep-ph
keywords stateslhcbpentaquarkpentaquarksantiquark-diquark-diquarkcharmdiscusshidden
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

The antiquark-diquark-diquark model describes pentaquark states both in terms of quarks and hadrons. We discuss pentaquark states with hidden charm $P(\bar c cuud)$ discovered in the $J/\Psi p$ spectrum by the LHCb collaboration. We consider three pentaquark states as members of the lowest ($S$-wave) multiplet and discuss the mass splitting scheme. The latest LHCb data for pentaquarks with hidden charm provide an opportunity to make an assumption about the diquark content of the pentaquark states. We give a classification for the LHCb pentaquarks and define recombination channels for these states.

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