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

An amplitude analysis of the $\pi^{0}\pi^{0}$ system produced in radiative$J/\psi$ decays is presented. In particular, a piecewise function thatdescribes the dynamics of the $\pi^{0}\pi^{0}$ system is determined as afunction of $M_{\pi^{0}\pi^{0}}$ from an analysis of the$(1.311\pm0.011)\times10^{9}$ $J/\psi$ decays collected by the BESIII detector.The goal of this analysis is to provide a description of the scalar and tensorcomponents of the $\pi^0\pi^0$ system while making minimal assumptions aboutthe properties or number of poles in the amplitude. Such a model-independentdescription allows one to integrate these results with other related resultsfrom complementary reactions in the development of phenomenological models,which can then be used to directly fit experimental data to obtain parametersof interest. The branching fraction of $J/\psi \to \gamma \pi^{0}\pi^{0}$ isdetermined to be $(1.15\pm0.05)\times10^{-3}$, where the uncertainty issystematic only and the statistical uncertainty is negligible.

An amplitude analysis of the $\pi^{0}\pi^{0}$ system produced in radiative $J/\psi$ decays