English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We study the hadronic $\eta^{\prime}\to\eta\pi\pi$ decays within theframework of $U(3)_{L}\otimes U(3)_{R}$ Chiral Perturbation Theory includingresonance states and the complete one-loop corrections. The amplitude isprojected in partial waves and unitarized by means of the $N/D$ methodresumming both the important $S$-and $D$-wave $\pi\pi$ and the subleading$S$-wave $\pi\eta$ final-state interactions. The participating scalar multipletmass and coupling strengths are determined from fits to the Dalitz plotexperimental data recently released by the A2 collaboration. As a byproduct ofour analysis, the associated Dalitz-plot slope parameters are found to be$a=-0.072(7)_{\rm{stat}}(8)_{\rm{syst}}\,,b=-0.052(1)_{\rm{stat}}(2)_{\rm{syst}}\,,d=-0.051(8)_{\rm{stat}}(6)_{\rm{syst}}$, which lie in the ballpark of thecurrent experimental and theoretical determinations.

$\eta^{\prime}\to\eta\pi\pi$ decays in unitarized resonance chiral theory