On the nature of the $π_2(1880)

Details On the nature of the $π_2(1880) On the nature of the $π_2(1880)

2008-11-06

arxiv.org/abs/0811.0918v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 3 figures, version accepted for publication in Phys. Rev. D

Scientific paper

The strong decays of the $\pi_2(1880)$ as the $2 ^1D_2$ quark-antiquark state are investigated in the $^3P_0$ 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 $2 ^1D_2$ meson and the $2^{-+}$ light hybrid are very different, and the experimental evidence for the $\pi_2(1880)$ is consistent with it being the conventional $2 ^1D_2$ meson rather than the $2^{-+}$ light hybrid. The possibility of the $\pi_2(1880)$ being a mixture of the conventional $q\bar{q}$ and the hybrid is discussed.

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