The Z(4430)- state appears to be made of a charm, an anti-charm, a down and an anti up quarks.

    Is this a completely new tetraquark, a bound state of four quarks, or some strange combination of two charmed mesons (mesons containing at least one charm quark)?

I'm betting on the latter, some kind of bound state of two mesons, maybe charmonium and the anti-pion.

posted by am_Unition: 1929 days ago