The Strong Decay Patterns of the $1^{-+}$ Exotic Hybrid Mesons

Details The Strong Decay Patterns of the $1^{-+}$ Exotic Hybrid Mesons The Strong Decay Patterns of the $1^{-+}$ Exotic Hybrid Mesons

2010-10-12

arxiv.org/abs/1010.2293v1

Phys.Rev.D83:014021,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 10 figures

Scientific paper

10.1103/PhysRevD.83.014021

We calculate the coupling constants of the decay modes $1^{-+}\rightarrow\rho\pi, f_1\pi, b_1\pi, \eta\pi, \eta'\pi, a_1\pi, f_1\eta$ within the framework of the light-cone QCD sum rule. Then we calculate the partial width of these decay channels, which differ greatly from the existing calculations using phenomenological models. For the isovector $1^{-+}$ state, the dominant decay modes are $\rho\pi, f_1\pi$. For its isoscalar partner, its dominant decay mode is $a_1\pi$. We also discuss the possible search of the $1^{-+}$ state at BESIII, for example through the decay chains $J/\psi (\psi')\to \pi_1 +\gamma$ or $J/\psi (\psi')\to \pi_1 +\rho$ where $\pi_1$ can be reconstructed through the decay modes $\pi_1\to \rho\pi\to \pi^+\pi^-\pi^0$ or $\pi_1\to f_1(1285)\pi^0$. Hopefully the present work will be helpful to the experimental establishment of the $1^{-+}$ hybrid meson.

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