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Five quarks,new particles and V + A currents
Authors:Y Achiman  K Koller  TF Walsh
Institution:Institut für Theor. Physik, Universität Heidelberg, Germany;Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
Abstract:We propose an SU(5) model for the new heavy mesons, with a charge ?13 fancy quark in addition to a charge +23 charmed quark. Besides interpreting the two narrow vector mesons J/Ψ and Ψ′ as cc and ff bound states and accounting for present data in a natural way, the model has (i) three new fancy vector mesons in addition to the charmed ones of the SU (4) model, (ii) at most two new C = P = + mesons (cc, 3PJ, J = 0, 1) between J/Ψ and Ψ ′, with suppressed radiative decays Ψ′ → 3PJ + γ, (iii) a state near 4.6 GeV in e+e?, decaying mostly to fancy mesons if it is broad or perhaps charmed mesons if it is narrow, (iv) V + A weak currents and a large anomaly in νN reactions, (v) a possible heavy lepton.
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