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

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

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M067M1

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT $\bf{ 1680 \pm20}$ OUR ESTIMATE • • We do not use the following data for averages, fits, limits, etc. • • $1663$ $\pm5$ ${}^{+16}_{-4}$ ABLIKIM 02 CB   BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \eta}}{{\mathit \pi}^{0}}$ $1656.8$ $\pm4.9$ 1 LICHARD 02   RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(nS)}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \eta}}{{\mathit \gamma}}$ $1683$ $\pm7$ $\pm9$ 2 ZHU 02   BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(nS)}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \eta}}{{\mathit \gamma}}$ $1678$ ${}^{+5}_{-3}$ $\pm7$ 3 ZHU 02 A   RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \phi}}$ $1673$ $\pm5$ 4 ABLIKIM 02 L   BES3 $2.0 - 3.08$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$ $1680$ ${}^{+12}_{-13}$ $\pm21$ 1.8k 5 ABLIKIM 02 F   BES3 ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \eta}}$ $1662$ $\pm20$ 6 ACHASOV 02 C   SND $1.3 - 2.0$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$ $1641$ ${}^{+24}_{-18}$ ACHASOV 01   SND ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit \eta}}$ $1667$ $\pm5$ $\pm11$ 3k 7 IVANOV 01 A   CMD3 $1.59 - 2.007$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \eta}}$ $1700$ $\pm23$ 2k 8 ACHASOV 01 A   SND $1.3 - 2.0$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$ ${{\mathit \pi}^{0}}$ $1674$ $\pm12$ $\pm6$ 6.2k 9 LEES 01 H   BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$ ${{\mathit \gamma}}$ $1733$ $\pm10$ $\pm10$ 10 LEES 01 F   BABR 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$ $1689$ $\pm7$ $\pm10$ 4.8k 11 SHEN 00   BELL 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$ $1709$ $\pm20$ $\pm43$ 12 AUBERT 00 S   BABR 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons $1623$ $\pm20$ 948 13 AKHMETSHIN 00   CMD2 $1.05 - 1.38$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_L^0}$ ${{\mathit K}_S^0}$ $\sim{}\text{ 1500}$ 14 ACHASOV 99 H   RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$, ${{\mathit \omega}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$, ${{\mathit K}^{+}}{{\mathit K}^{-}}$ $\sim{}\text{ 1900}$ 15 ACHASOV 99 H   RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\mp}}$ $1700$ $\pm20$ 16 CLEGG 99   RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$, ${{\mathit K}_S^0}$ ${{\mathit K}}{{\mathit \pi}}$ $1657$ $\pm27$ 367 BISELLO 99 C   DM2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\mp}}$ $1655$ $\pm17$ 17 BISELLO 98 B   DM2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$ $1680$ $\pm10$ 18 BUON 98   DM1 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons $1677$ $\pm12$ 19 MANE 98   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 data from IVANOV 1981, BARKOV 1987, BISELLO 1988B, DOLINSKY 1991, and ANTONELLI 1992. 15  Using the data from BISELLO 1991C. 16  Using BISELLO 1988B and MANE 1982 data. 17  From global fit including ${{\mathit \rho}}$, ${{\mathit \omega}}$, ${{\mathit \phi}}$ and ${{\mathit \rho}{(1700)}}$ assume mass 1570 MeV and width 510 MeV for ${{\mathit \rho}}$ radial excitation. 18  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. 19  Fit to one channel only, neglecting interference with ${{\mathit \omega}}$, ${{\mathit \rho}{(1700)}}$.

References

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