The Hadronic Decay Ratios of η′ → 5π at NLO in χPT

摘要

The hadronic decays η′(958) → 2πη and η → 3π give unique scientific opportunityto study symmetries in nature and to provide experimental verification of the sophisticatedtheoretical predictions and to reveal the driving mechanism of the decays as well as violatingof isospin symmetry. We give the next-to-leading order(NLO) results in Chiral PerturbationTheory(χPT) for the ratio of different η′(958) → 5π decay rates. The hadronic decay modesare also discussed and in particular some interesting features of the η′ decay are presented. Thescenario we have considered shows reasonable agreement with the decay processes observed sofar.