Measurement of the Matrix Element for the Decay ${\eta }^{\prime }\to \eta {\pi }^{+}{\pi }^{-}$

Abstract

The Dalitz plot of ${\eta }^{\prime }\to \eta {\pi }^{+}{\pi }^{-}$ decay is studied using $(225.2\pm 2.8)\times 10^6$ $\jpsi$ events collected with the BESIII detector at the BEPCII $e^{+}{e}^{-}$ collider. With the largest sample of ${\eta }^{\prime }$ decays to date, the parameters of the Dalitz plot are determined in a generalized and a linear representation. Also the branching fraction of $\jpsi \to γη^{\prime}$ is determined to be $(4.84\pm 0.03\pm 0.24)\times 10^{-3}$, where the first error is statistical and the second systematic.

20 pages, 5 figures, published in PRD

References in corpus (2)

• Study of ${\eta }^{\prime }\to \eta {\pi }^{+}{\pi }^{-}$ Dalitz plot
• $\eta$ and ${\eta }^{\prime }$ Physics at BES-III

Cited by in corpus (22)

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• Spin-Parity Analysis of ppbar Mass Threshold Structure in J/psi and psi' Radiative Decays
• eta - eta prime Mixing -From electromagnetic transitions to weak decays of charm and beauty hadrons
• Measurement of the Matrix Elements for the Decays $\eta \to {\pi }^{+}{\pi }^{-}{\pi }^0$ and $\eta /{\eta }^{\prime }\to {\pi }^0{\pi }^0{\pi }^0$
• Study of resonant structure around 1.8 GeV/$c^2$ and $\eta (1405)$ in $J/\psi \to \omega \eta {\pi }^{+}{\pi }^{-}$
• Measurement of the matrix elements for the decays ${\eta }^{\prime }\to \eta {\pi }^{+}{\pi }^{-}$ and ${\eta }^{\prime }\to \eta {\pi }^0{\pi }^0$
• Precision measurement of the branching fractions of J/psi -> pi+pi-pi0 and psi' -> pi+pi-pi0
• Observation of the doubly radiative decay ${\eta }^{\prime }\to \gamma \gamma {\pi }^0$
• An overview of $\eta$ and ${\eta }^{\prime }$ decays at BESIII
• Dispersive construction of two-loop $P\to \pi \pi \pi$ $(P=K,\eta )$ amplitudes
• Patterns of $C$- and $CP$-violation in hadronic $\eta$ and ${\eta }^{\prime }$ three-body decays
• Measurement of ${\chi }_{cJ}$ decaying into ${\eta }^{\prime }{K}^{+}{K}^{-}$
• Revisiting the radiative decays $J/\psi \to \gamma {\eta }^{(\prime )}$ in perturbative QCD
• Revisiting the $P$-wave charmonium radiative decays $h_c\to \gamma {\eta }^{(\prime )}$ with relativistic corrections
• Measurement of the decay ${\eta }^{\prime }\to {\pi }^0{\pi }^0\eta$ at MAMI
• Strange Quarkonium States at BESIII
• Event generators for $\eta /{\eta }^{\prime }$ decays at BESIII
• Measurement of the absolute branching fraction of the singly Cabibbo suppressed decay ${\Lambda }_c^{+}\to p{\eta }^{\prime }$
• Search for CP and $P$ violating pseudoscalar decays into $\pi \pi$
• Measurement of the branching fraction for $\psi (3770)\to \gamma {\chi }_{c0}$
• Tests of the fundamental symmetries in eta meson decays