TL;DR
This paper discusses the role of non-perturbative gluon effects in the eta prime meson’s mass, interactions, and production, highlighting recent experimental results and their implications for axial U(1) physics.
Contribution
It provides an introduction to axial U(1) physics and explores how non-perturbative glue influences eta prime interactions and production in nuclear media, including recent experimental findings.
Findings
Resonant eta prime pi production in exotic quantum states
New experimental results from COMPASS and CBELSA/TAPS
Non-perturbative glue's role in eta prime mass and interactions
Abstract
Non-perturbative glue associated with gluon topology plays a vital role in determining the mass of the etaprime meson. We give an introduction to axial U(1) physics and explain how this non-perturbative glue also contributes to etaprime interactions with other hadrons. We concentrate on resonant etaprime pi production in partial waves with exotic quantum numbers not compatible with a quark-antiquark state and on the etaprime in nuclear media where there are new results from the COMPASS and CBELSA/TAPS experiments respectively.
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