That didn’t take long
August 31, 2007
Three theoretical discussions of the Z(4430) state have shown up on hep-ph in the last couple of days:
- Rosner suggests it’s a rescattering effect in threshold production of D*(2010) D1(2420);
- Maiani, Polosa, and Riquer suggest it’s a true tetraquark state, the first radial excitation of the X(3872)/X(3876);
- Meng and Chao suggest it’s an actual resonance in D*(2010) D1(2420).