科研之友
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摘要
Non-perturbative glue associated with gluon topology plays a vital role in determining the mass of the eta ' meson. We give an introduction to axial U(1) physics and explain how this non-perturbative glue also contributes to eta ' interactions with other hadrons. We concentrate on resonant eta 'pi production in partial waves with exotic quantum numbers not compatible with a quark-antiquark state and on the eta ' in nuclear media where there are new results from the COMPASS and CBELSA/TAPS experiments, respectively.
- 出版日期2014-12
