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An amplitude analysis of the $\pi^{0}\pi^{0}$ system produced in radiative $J/\psi$ decays
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arxiv 1506.00546 v2 pith:UB52UOZI submitted 2015-06-01 hep-ex
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abstract
An amplitude analysis of the $\pi^{0}\pi^{0}$ system produced in radiative $J/\psi$ decays is presented. In particular, a piecewise function that describes the dynamics of the $\pi^{0}\pi^{0}$ system is determined as a function 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 tensor components of the $\pi^0\pi^0$ system while making minimal assumptions about the properties or number of poles in the amplitude. Such a model-independent description allows one to integrate these results with other related results from complementary reactions in the development of phenomenological models, which can then be used to directly fit experimental data to obtain parameters of interest. The branching fraction of $J/\psi \to \gamma \pi^{0}\pi^{0}$ is determined to be $(1.15\pm0.05)\times10^{-3}$, where the uncertainty is systematic only and the statistical uncertainty is negligible.
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Cited by 5 Pith papers
Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record
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$\eta$ and $\eta'$ production in $J/\psi$ radiative decays from quantum chromodynamics
hep-lat 2025-06 conditional novelty 8.0 of 10
The first 2+1 flavor lattice QCD calculation of J/psi to gamma eta and gamma eta' form factors finds an enhanced eta'/eta ratio but absolute rates below experiment at m_pi around 391 MeV.
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$\eta$ and $\eta'$ meson production in $J/\psi$ radiative decays from lattice QCD
hep-lat 2025-06 accept novelty 8.0 of 10
A 2+1 flavor lattice QCD calculation determines the J/psi to gamma eta and J/psi to gamma eta' transition form factors separately for the first time, finding rates below experiment.
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Amplitude analysis of $\psi(3686)\to \gamma K_S^0 K_S^0 $
hep-ex 2025-02 unverdicted novelty 7.0 of 10
First amplitude analysis of ψ(3686)→γKS0KS0 with a one-channel K-matrix finds four f0 and three f2 poles consistent with known states and reports branching-fraction ratios to J/ψ decays that constrain possible gluebal...
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Partial wave analysis of reactions with four meson final states
hep-ph 2025-05 conditional novelty 6.0 of 10
This paper presents a covariant tensor formalism for partial-wave amplitudes of resonances decaying to four pseudoscalar mesons, covering two-resonance and cascade topologies.
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Dispersive analysis of the $\boldsymbol{J/\psi \to \gamma \pi^0 \pi^0}$ process
hep-ph 2026-06 unverdicted novelty 5.0 of 10
The analysis selects the negative E1 phase solution for 0++-2++ amplitudes in J/ψ → γπ⁰π⁰ as consistent with Omnès phases from f0 resonances without large extra phases, and normalizes amplitudes via the branching frac...
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