On the Nature of the Π 2 (1880)
نویسندگان
چکیده
The strong decays of the π 2 (1880) as the 2 1 D 2 quark-antiquark state are investigated in the 3 P 0 model and the flux-tube model, respectively. The results are similar in the two models. It is found that the decay patterns of the conventional 2 1 D 2 meson and the 2 −+ light hybrid are very different, and the experimental evidence for the π 2 (1880) is consistent with it being the conventional 2 1 D 2 meson rather than the 2 −+ light hybrid. The possibility of the π 2 (1880) being a mixture of the conventional q ¯ q and the hybrid is discussed.
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