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arXiv · hep-ph/9804360

Quarkonium Mass Splitting Revisited: Effects of Closed Mesonic Channels

M. Shmatikov
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Abstract

Modifications of the mass spectrum the quarkonium induced by its virtual dissociation into a pair of heavy mesons is considered. Coupling between quark and mesonic channels results in noticeable corrections to spin-dependent mass splitting. In particular, the observable hierarchy of mass splittings in the $χ_c, χ_b$ and $χ'_b$ multiplets is reproduced.

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M. Shmatikov. 1998-04-22. Quarkonium Mass Splitting Revisited: Effects of Closed Mesonic Channels. https://doi.org/10.1016/s0370-2693(98)01504-4

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