What does this research mean for the field?

Within the Nambu-Jona-Lasinio model, vector channels provide the main contribution to the decays of η/η' → πγγ and η' → ηγγ, yielding decay widths that are in satisfactory agreement with experimental data. Novelty: ClaimNovelty.CONFIRMATORY. Consensus alignment: ConsensusAlignment.SUPPORTS_CONSENSUS.

What question did this study set out to answer?

This research aims to analyze the decays of η mesons to assess the role of vector channels and decay constants.

June 10, 2026

Decays of the η Mesons η/η' → πγγ and η' → ηγγ within the Nambu–Jona-Lasinio Model

Key Points

This research aims to analyze the decays of η mesons to assess the role of vector channels and decay constants.
Utilized the Nambu–Jona-Lasinio model for decays of η/η' mesons.
Examined the effect of decay constants of vector mesons on decay widths.
Considered electromagnetic interactions in the analysis.
Found that vector channels contribute significantly to the decay processes.
Results are in satisfactory agreement with experimental data.

Abstract

The decays of the η mesons / { { { { 1pt '}}. -0em} { 1pt '}} and 1pt ' are considered within the Nambu–Jona-Lasinio model. It is shown that vector channels give the main contribution. An analysis of the influence of the decay constants of vector mesons on the widths of these processes is carried out taking into account the electromagnetic interactions of these mesons. The obtained results are in satisfactory agreement with experimental data.

Decays of the η Mesons η/η' → πγγ and η' → ηγγ within the Nambu–Jona-Lasinio Model

Key Points

Abstract

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