New Predictions for Multiquark Hadron Masses
Abstract
The recent reported charmed-strange resonance at 2.32 GeV/c suggests a possible multiquark state. Three types of multiquark bound states are reviewed. A previous model-independent variational approach considers a tetraquark with two heavy antiquarks and two light quarks as a heavy antidiquark with the color field of a quark bound to the two light quarks with a wave function like that of a heavy baryon. Results indicate that a charmed-strange tetraquark c s u d or a bottom-strange tetraquark b s u d with this "diquark-heavy-baryion" wave function is not bound, in contrast to "molecular-type" D-K and B-K wave functions. However, a charmed-bottom tetraquark c b u d might be bound with a very narrow weak decay mode. A "molecular-type" D-B state can have an interesting Bc π decay with a high energy pion,
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