# Leading-twist two gluon distribution amplitude and exclusive processes involving eta and eta' mesons

Source: [Leading-twist two gluon distribution amplitude and exclusive processes involving eta and eta' mesons](<https://www.sota2.com/research/paper/68fa362e1e209131ce8a7e72>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T21:41:59.928Z

Authors: K. Passek

Published: 2002-10-04T16:52:54.000Z

## Abstract

I briefly review the formalism for treating the leading-twist two-gluon states appearing in processes which involve eta and eta' mesons. The constraints on the size of the lowest order Gegenbauer coefficients of the two-gluon distribution amplitude are obtained from the fit to the eta and eta' transition form factor data. The results are applied to chi -\> eta eta (eta' eta') decays and deeply virtual electroproduction of eta and eta' mesons.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/hep-ph/0210079>)

[PDF](<https://arxiv.org/pdf/hep-ph/0210079.pdf>)