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${{\mathit \phi}{(1680)}}$ WIDTH

${{\mathit e}^{+}}{{\mathit e}^{-}}$ PRODUCTION

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M067W1

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT $\bf{ 150 \pm50}$ OUR ESTIMATE  This is only an educated guess; the error given is larger than the error on the average of the published values. • • We do not use the following data for averages, fits, limits, etc. • • $150.8$ $\pm7.0$ 1 LICHARD 2023 RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(nS)}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \eta}}{{\mathit \gamma}}$ $149$ $\pm12$ $\pm13$ 2 ZHU 2023 BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(nS)}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \eta}}{{\mathit \gamma}}$ $156$ $\pm5$ $\pm9$ 3 ZHU 2023 A RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \phi}}$ $172$ $\pm8$ 4 ABLIKIM 2022 L BES3 $2.0 - 3.08$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$ $185$ ${}^{+30}_{-26}$ ${}^{+25}_{-47}$ 1.8k 5 ABLIKIM 2020 F BES3 ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \eta}}$ $159$ $\pm32$ 6 ACHASOV 2020 C SND $1.3 - 2.0$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$ $103$ ${}^{+26}_{-24}$ ACHASOV 2019 SND ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit \eta}}$ $176$ $\pm23$ $\pm38$ 3k 7 IVANOV 2019 A CMD3 $1.59 - 2.007$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \eta}}$ $300$ $\pm50$ 2k 8 ACHASOV 2018 A SND $1.3 - 2.0$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$ ${{\mathit \pi}^{0}}$ $165$ $\pm38$ $\pm70$ 6.2k 9 LEES 2014 H BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$ ${{\mathit \gamma}}$ $300$ $\pm15$ $\pm37$ 10 LEES 2012 F BABR 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$ $211$ $\pm14$ $\pm19$ 4.8k 11 SHEN 2009 BELL 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$ $322$ $\pm77$ $\pm160$ 12 AUBERT 2008 S BABR 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons $139$ $\pm60$ 948 13 AKHMETSHIN 2003 CMD2 $1.05 - 1.38$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_L^0}$ ${{\mathit K}_S^0}$ $300$ $\pm60$ 14 CLEGG 1994 RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$, ${{\mathit K}_S^0}$ ${{\mathit K}}{{\mathit \pi}}$ $146$ $\pm55$ 367 BISELLO 1991 C DM2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\mp}}$ $207$ $\pm45$ 15 BISELLO 1988 B DM2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$ $185$ $\pm22$ 16 BUON 1982 DM1 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons $102$ $\pm36$ 17 MANE 1982 DM1 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}}{{\mathit \pi}}$ 1  From a VDM fit to ZHU 2023 ${{\mathit \eta}}{{\mathit \phi}}{{\mathit \gamma}}$ data with two resonances, ${{\mathit \phi}{(1680)}}$, ${{\mathit \phi}{(2170)}}$, and a third resonance with mass $1850.7$ $\pm5.3$ MeV and width $25$ $\pm35$ MeV of 1.7 $\sigma $ statistical evidence. 2  From a fit using a vector meson dominance model with contributions from ${{\mathit \phi}{(1680)}}$, ${{\mathit \phi}{(2170)}}$ and non resonant contribution. 3  From the analysis of the combined measurements of ${\mathit \sigma (}$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \phi}}{)}$ from BaBar, Belle, BESIII, CMD3. 4  From a partial wave amplitude analysis at $\sqrt {s }$ = 2.125 GeV which includes all the possible intermediate states that match $\mathit J{}^{PC}$ conservation in the subsequent two-body decay. The intermediate states are parameterized with the relativistic Breit-Wigner functions. Statistical error only. 5  Seen in ${{\mathit \psi}{(2S)}}$ decay with branching ratio ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit X}}{{\mathit \eta}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \eta}}$ = ($12.0$ $\pm1.3$ ${}^{+6.5}_{-6.9}$) $ \times 10^{-6}$. 6  From a fit using a vector meson dominance model with contribution from ${{\mathit \rho}{(770)}}$, ${{\mathit \omega}{(782)}}$, ${{\mathit \phi}{(1020)}}$, ${{\mathit \omega}{(1420)}}$, ${{\mathit \rho}{(1450)}}$. 7  From a fit with coherent interference of the ${{\mathit \phi}{(1680)}}$ with a non-resonant contribution. 8  Assuming the ${{\mathit K}}{{\overline{\mathit K}}^{*}{(892)}}$ + c.c. dynamics. Systematic uncertainties not estimated. 9  Using a vector meson dominance model with contribution from ${{\mathit \phi}{(1020)}}$, ${{\mathit \phi}{(1680)}}$, and higher mass excitations of ${{\mathit \rho}{(770)}}$ and ${{\mathit \omega}{(782)}}$. 10  Using events with ${{\mathit \pi}}{{\mathit \pi}}$ invariant mass less than 0.85 GeV. 11  From a fit with two incoherent Breit-Wigners. 12  From the simultaneous fit to the ${{\mathit K}}{{\overline{\mathit K}}^{*}{(892)}}$ + c.c. and ${{\mathit \phi}}{{\mathit \eta}}$ data from AUBERT 2008S using the results of AUBERT 2007AK. 13  From the combined fit of AKHMETSHIN 2003 and MANE 1981 also including ${{\mathit \rho}}$, ${{\mathit \omega}}$, and ${{\mathit \phi}}$. Neither isospin nor flavor structure known. 14  Using BISELLO 1988B and MANE 1982 data. 15  From global fit including ${{\mathit \rho}}$, ${{\mathit \omega}}$, ${{\mathit \phi}}$ and ${{\mathit \rho}{(1700)}}$ 16  From global fit of ${{\mathit \rho}}$, ${{\mathit \omega}}$, ${{\mathit \phi}}$ and their radial excitations to channels ${{\mathit \omega}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$, ${{\mathit K}^{+}}{{\mathit K}^{-}}$, ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$ , ${{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\mp}}$. Assume mass 1570 MeV and width 510 MeV for ${{\mathit \rho}}$ radial excitations, mass 1570 and width 500 MeV for ${{\mathit \omega}}$ radial excitation. 17  Fit to one channel only, neglecting interference with ${{\mathit \omega}}$, ${{\mathit \rho}{(1700)}}$.

References

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