Evidence for the existence of a flavor-sextet charmed meson?
Abstract
Recently, the LHCb Collaboration reported a signal for a new resonance in the Ds+ π invariant mass distribution in the decays B D(*) Ds+ π+ π- (arXiv:2411.03399). This could be a direct observation of an SU(3) flavor-sextet charmed meson with JP=0+. Such an SU(3) multiplet, is beyond the conventional quark-antiquark picture, and thus a verification of this observation is important.
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