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

Abstract

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.

13 pages, 3 figures, matches published version

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Cited by in corpus (18)

• Heavy quarkonium: progress, puzzles, and opportunities
• Observation of the resonant character of the $Z(4430{)}^{-}$ state
• The Z(4430) and a New Paradigm for Spin Interactions in Tetraquarks
• Heavy hadronic molecules with pion exchange and quark core couplings: a guide for practitioners
• Analysis of the $Z(4430)$ as the first radial excitation of the $Z_c(3900)$
• Decays of Zb(+) and Zb'(+) as hadronic molecules
• Treating $Z_c(3900)$ and $Z(4430)$ as the ground-state and first radially excited tetraquarks
• Structure and decays of hidden heavy pentaquarks
• Four-quark structure of Zc(3900), Z(4430) and Xb(5568) states
• Strong three-body decays of Lambdac(2940)+
• Radiative and dilepton decays of the hadronic molecule Zc(3900)+
• Resolving the puzzling decay patterns of charged $Z_c$ and $Z_b$ states
• Radiative decay Y(4260) -> X(3872) + gamma involving hadronic molecular and charmonium components
• Photoproduction of Z(4430) through mesonic Regge trajectories exchange
• Tetraquarks in holographic QCD
• Recoupling Mechanism for exotic mesons and baryons
• Decay of vector-vector resonances into $\gamma$ and a pseudoscalar meson
• Modifications on parameters of $Z(4430)$ in a dense medium