Analysis of the ${\eta }_1(1855)$ as a $K{\bar{K}}_1(1400)$ molecular state

Abstract

In this work, we study the radiative and strong decay of $S$-wave $K{\bar{K}}_1(1400)$ molecular state within the effective Lagrangians approach and find the relation between the $K{\bar{K}}_1(1400)$ molecular state and the newly observed ${\eta }_1(1855)$ state by comparing with the BESIII observation. The prediction indicates that the decay width can reach up to $182.97_{-3.50}^{+2.79}$ MeV, which can be confronted with the experimental data. If the ${\eta }_1(1855)$ could be $S$-wave $K{\bar{K}}_1(1400)$ molecular state, the $K{\bar{K}}^{\ast }\pi$ three-body decay provides the dominant contribution, not the $\eta {\eta }^{{}^{\prime }}$ channel found in the experiment. In addition, the partial width for ${\eta }_1(1855)\to \gamma \varphi$ can reach up to $17.95_{-0.43}^{+0.21}$ KeV. Those results can be measured in future experiments and used to test the nature of the ${\eta }_1(1855)$.

accepted by NPA

References in corpus (5)

• Lattice QCD Evidence that the Lambda(1405) Resonance is an Antikaon-Nucleon Molecule
• Observation of an isoscalar resonance with exotic $J^{PC}=1^{-+}$ quantum numbers in $J/\psi \to \gamma \eta {\eta }^{\prime }$
• $f_1(1285)$ decays into $a_0(980){\pi }^0$, $f_0(980){\pi }^0$ and isospin breaking
• QCD axial anomaly enhances the $\eta {\eta }^{\prime }$ decay of the hybrid candidate ${\eta }_1(1855)$
• Long-distant contribution and ${\chi }_{c1}$ radiative decays to light vector meson

Cited by in corpus (15)

• $1^{-+}$ Hybrid in $J/\psi$ Radiative Decays from Lattice QCD
• Constructing the $J^{P(C)}=1^{-(+)}$ light flavor hybrid nonet with the newly observed ${\eta }_1(1855)$
• On the ${\eta }_1(1855)$, ${\pi }_1(1400)$ and ${\pi }_1(1600)$ as dynamically generated states and their SU(3) partners
• Radiative production and decays of the exotic ${\eta }_1^{\prime }(1855)$ and its siblings
• Light double-gluon hybrid states from QCD sum rules
• Fully-strange tetraquark states with the exotic quantum numbers $J^{PC}=0^{+-}$ and $2^{+-}$
• Predictions of the hybrid mesons with exotic quantum numbers $J^{PC}=2^{+-}$
• Light double-gluon hybrid states with the exotic quantum numbers $J^{PC}=1^{-+}$ and $3^{-+}$
• Revealing the inner structure of the newly observed ${\eta }_1(1855)$ via photoproduction
• Investigating ${\eta }_1^{\prime }(1855)$ exotic states in $J/\psi \to {\eta }_1^{\prime }(1855){\eta }^{(\prime )}$ decays
• Mixing angle of $K_1(1270/1400)$ and the $K{\bar{K}}_1(1400)$ molecular interpretation of ${\eta }_1(1855)$
• 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
• Proper constituent gluon mass as the final piece to construct hybrid mesons
• Light tetraquark states with exotic quantum numbers $J^{PC}=2^{+-}$
• Systematic study of exotic $1^{-+}$ tetraquark spectroscopy