University of Minnesota
School of Physics & Astronomy




by S. Dubynskiy (Minnesota U.) , Voloshin (Minnesota U., Theor. Phys. Inst. & Moscow, ITEP) in Phys.Lett.B666:344-346,2008.

We argue that relatively compact charmonium states, J / ψ- , ψ(2S)- , χc- , can very likely be bound inside light hadronic matter, in particular inside higher resonances made from light quarks and/or gluons. The charmonium state in such binding essentially retains its properties, so that the bound system decays into light mesons and the particular charmonium resonance. Thus such bound states of a new type, which we call hadro-charmonium, may explain the properties of some of the recently observed resonant peaks, in particular of Y(4.26), Y(4.32-4.36), Y(4.66), and Z(4.43). We discuss further possible implications of the suggested picture for the observed states and existence of other states of hadro-charmonium and hadro-bottomonium.

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