Exploring the role of higher $\omega$ meson states in the $e^+ e^-\rightarrow b_1(1235) \pi$ process

Zhao-Yang Wu; Zi-Yue Bai; Li-Ming Wang

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arXiv · 2511.06664

Exploring the role of higher $\omega$ meson states in the $e^+ e^-\rightarrow b_1(1235) \pi$ process

Zhao-Yang Wu·Zi-Yue Bai·Li-Ming Wang

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Abstract

The properties of light vector mesons near 2.2 GeV remain poorly understood, impeding progress in mapping the higher-lying hadronic spectrum. Utilizing the newly released BESIII data on the Born cross sections for the process of $e^+ e^- \rightarrow b_1(1235) \pi$, we conduct a combined analysis incorporating theoretical predictions for the mass spectrum and decay properties of $\omega$-meson family. Our fit demonstrates that the enhancement structure near 2.2 GeV originates not from a single resonance, but from the significant interference between the $\omega(4S)$ and $\omega(3D)$ states, which have comparable contributions. This interpretation resolves the apparent discrepancy in the resonance parameters and yields values consistent with theoretical expectations. Our work provides a key interpretation of the vector enhancement structure and establishes a vital framework for identifying higher radial and orbital excitations in the $\omega$ meson family, thereby advancing the mapping of the light-hadron spectrum.

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Zhao-Yang Wu, Zi-Yue Bai, Li-Ming Wang. 2025-11-10. Exploring the role of higher $\omega$ meson states in the $e^+ e^-\rightarrow b_1(1235) \pi$ process. https://arxiv.org/abs/2511.06664

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