Is eta' partially made of gluonium?

2007/12/11 by Rafel Escribano, Escribano, Rafel
Physics and Astronomy · #Black Holes and Theoretical Physics #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.0712.1814

openalex publication_date 2007/12/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

A phenomenological analysis of radiative V→ Pγ and P→ Vγ decays is performed in order to determine the gluonic content of the η^′ wave function. Our result shows that there is no evidence for such a gluonium contribution, Z_η^′²=0.04± 0.09. In terms of a mixing angle description this corresponds to ϕ_P=(41.4± 1.3)^∘ and |ϕ_{η^′ G}|=(12± 13)^∘.

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