Hidden-charm and radiative decays of the Z(4430) as a hadronic D_1 \bar{D^\ast} bound state

Details Hidden-charm and radiative decays of the Z(4430) as a hadronic D_1 \bar{D^\ast} bound state Hidden-charm and radiative decays of the Z(4430) as a hadronic D_1 \bar{D^\ast} bound state

2010-05-18

arxiv.org/abs/1005.3168v2

Phys.Rev.D82:054025,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 3 figures, matches published version

Scientific paper

10.1103/PhysRevD.82.054025

We study the $Z^\pm(4430)$ meson within a heavy hadron molecule interpretation where the $Z$ is considered as a bound state of a vector $D^\ast(2010)$ and an axial-vector $D_1(2420)$. We give predictions for the strong hidden-charm $Z^\pm(4430) \to \pi^\pm \psi$ and $\pi^\pm\psi^\prime$ decay widths and also study the radiative $Z^\pm\;(J^P=1^-) \to \pi^\pm\gamma$ decay properties in a phenomenological Lagrangian approach. Our findings are qualitatively in line with the experimental observation that the $\pi^\pm\psi^\prime$ transition dominates over the $\pi^\pm\psi$ decay mode despite a smaller phase space. The width for the radiative mode $\pi^\pm\gamma$ is sizable, allowing possible detection in future experiments.

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