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arXiv · 1901.07177

Dynamical analysis of the $X$ resonance contributions to the decay $J/ψ\toγX\toγϕϕ$

A. A. Kozhevnikov
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Abstract

The dynamics of the $J^{PC}=0^{-+}$, $0^{++}$, and $2^{++}$ resonance contributions to the decay $J/ψ\toγX(J^{PC})\toγϕϕ$ is analysed using the data obtained by BESIII collaboration. The effective coupling constants parameterising invariant amplitudes of the transitions $J/ψ\toγX(J^{PC})$ and $X(J^{PC})\toϕϕ$ and masses of $X(J^{PC})$ resonances are found from the fits. They are used for evaluation of the branching fractions $B_{X(J^{PC})\toϕϕ}$, relative branching fractions $B_{J/ψ\toγX(J^{PC})\toγϕϕ}$, and for obtaining the photon angular distributions.

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A. A. Kozhevnikov. 2019-01-22. Dynamical analysis of the $X$ resonance contributions to the decay $J/ψ\toγX\toγϕϕ$. https://doi.org/10.1103/physrevd.99.014019

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