Radiative production and decays of the exotic ${\eta }_1^{\prime }(1855)$ and its siblings

Abstract

We study the production of the light $J^{PC}=1^{-+}$ hybrid isoscalars ${\eta }_1^{\prime }(1855)$ and the yet undiscovered ${\eta }_1^{hyb}(1660)$ as intermediate states in the radiative decays of the charmonium ($J/\psi$) to two conventional mesons using a flavor symmetric Lagrangian. For this purpose, we use the $J/\psi \to \gamma {\eta }_1^{\prime }(1855)\to \gamma \eta {\eta }^{\prime }$ process as the reference. We find that some of the decay channels have branching ratios similar to or larger than that of the $\gamma \eta {\eta }^{\prime }$ channel and are sensitive to the mixing between the hybrid isoscalars. We propose that relatively stable $\gamma \eta f_1(1285)$ channel be explored for the presence of the light hybrid isoscalar ${\eta }_1^{hyb}(1660)$. We also exploit the strong decay channels containing at least one vector meson to study the radiative decays of the whole hybrid nonet $\{{\pi }_1(1600),K_1^{hyb}(1750),{\eta }_1^{hyb}(1660),{\eta }_1^{\prime }(1855)\}$. We find that the hybrids cannot radiatively decay into the $I=0$ pseudoscalars. Furthermore, the vector decay channels ($(\rho /\omega /\varphi )\gamma$) of the hybrid isoscalars are sensitive to the strangeness content of the hybrids. We also provide estimates for the branching fractions for the radiative production and partial widths for the radiative decays of the hybrids.

14 pages, matches published version

References in corpus (30)

• Toward the excited meson spectrum of dynamical QCD
• Isoscalar meson spectroscopy from lattice QCD
• On the spectral functions of scalar mesons
• Observation of an isoscalar resonance with exotic $J^{PC}=1^{-+}$ quantum numbers in $J/\psi \to \gamma \eta {\eta }^{\prime }$
• Decays of an exotic $1^{-+}$ hybrid meson resonance in QCD
• Scalar isoscalar mesons and the scalar glueball from radiative $J/\psi$ decays
• Confirmation of a pi_1^0 Exotic Meson in the ηπ^0 System
• Partial wave analysis of $J/\psi \to \gamma \eta {\eta }^{\prime }$
• Hybrid meson properties in Lattice QCD and Flux Tube Models
• Masses of J^PC =1^-+ exotic quarkonia in a Bethe-Salpeter-equation approach
• Towards the establishment of the light $J^{P(C)}=1^{-(+)}$ hybrid nonet
• Possible structure of the newly found exotic state ${\eta }_1(1855)$
• Strong and radiative decays of excited vector mesons and predictions for a new $\varphi (1930)$ resonance
• $S$- and $P$-wave fully-strange tetraquark states from QCD sum rules
• The phenomenology of the exotic hybrid nonet with ${\pi }_1(1600)$ and ${\eta }_1(1855)$
• QCD axial anomaly enhances the $\eta {\eta }^{\prime }$ decay of the hybrid candidate ${\eta }_1(1855)$
• Two dynamical generated $a_0$ resonances by interactions between vector mesons
• Prediction of a narrow exotic hadronic state with quantum numbers $J^{PC}=0^{--}$
• The Strong Decay Patterns of the $1^{-+}$ Exotic Hybrid Mesons
• A Comprehensive Study of the Radiative Decays of $J/\psi$ and $\psi (2S)$ to Pseudoscalar Meson Pairs, and Search for Glueballs
• A simple alternative to the Breit-Wigner distribution
• Analysis of the ${\eta }_1(1855)$ as a $K{\bar{K}}_1(1400)$ molecular state
• Newly observed $a_0(1817)$ as the scaling point of constructing the scalar meson spectroscopy
• Partial wave analysis of $J/\psi \to \gamma {\eta }^{\prime }{\eta }^{\prime }$
• Production of the ${\eta }_1(1855)$ through kaon induced reactions under the assumptions that it is a molecular or a hybrid state
• Mass Predictions of Vector ($1^{--}$) Double-gluon Heavy Quarkonium Hybrids from QCD Sum Rules
• Observation of $J/\psi \to \gamma \eta {\pi }^0$
• Light double-gluon hybrid states from QCD sum rules
• Constraints imposed by the partial wave amplitudes on the decays of $J=1,2$ mesons
• Faddeev fixed-center approximation to the $\eta K^{\ast }{\bar{K}}^{\ast }$, $\pi K^{\ast }{\bar{K}}^{\ast }$ and $K{K}^{\ast }{\bar{K}}^{\ast }$ systems

Cited by in corpus (9)

• Constructing the $J^{P(C)}=1^{-(+)}$ light flavor hybrid nonet with the newly observed ${\eta }_1(1855)$
• Ordinary and exotic mesons in the extended Linear Sigma Model
• Predictions of the hybrid mesons with exotic quantum numbers $J^{PC}=2^{+-}$
• Revealing the inner structure of the newly observed ${\eta }_1(1855)$ via photoproduction
• Mixing angle of $K_1(1270/1400)$ and the $K{\bar{K}}_1(1400)$ molecular interpretation of ${\eta }_1(1855)$
• Light tetraquark states with exotic quantum numbers $J^{PC}=2^{+-}$
• Decay properties of light $1^{-+}$ hybrids
• Revisit the heavy quarkonium double-gluon hybrid mesons with exotic quantum numbers
• Systematic study of exotic $1^{-+}$ tetraquark spectroscopy