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${{\mathit f}_{{{2}}}{(1810)}}$ MASS

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M038M

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT $\bf{ 1815 \pm12}$ OUR AVERAGE  Error includes scale factor of 1.4.  See the ideogram below. $1822$ ${}^{+29}_{-24}$ ${}^{+66}_{-57}$ 5.5k 1 ABLIKIM 2013 N BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}}{{\mathit \eta}}$ $1737$ $\pm9$ ${}^{+198}_{-65}$ 2 UEHARA 2010 A BELL 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \eta}}{{\mathit \eta}}$ $1800$ $\pm30$ 40 ALDE 1988 D GAM4 300 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit p}}$4 ${{\mathit \pi}^{0}}$ $1806$ $\pm10$ 1600 ALDE 1987 GAM4 100 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ 4 ${{\mathit \pi}^{0}}{{\mathit n}}$ $1870$ $\pm40$ 3 ALDE 1986 D GAM4 100 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \eta}}{{\mathit n}}$ $1857$ ${}^{+35}_{-24}$ 4 COSTA 1980 OMEG 10 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit n}}$ • • We do not use the following data for averages, fits, limits, etc. • • $1845.0$ $\pm2.2$ ${}^{+1.6}_{-7.2}$ 5 ALBRECHT 2020 RVUE 0.9 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \eta}}$ , ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$ , ${{\mathit \pi}^{0}}{{\mathit K}^{+}}{{\mathit K}^{-}}$ $1858$ ${}^{+18}_{-71}$ 6 LONGACRE 1986 RVUE Compilation $1799$ $\pm15$ 7 CASON 1982 STRC 8 ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \Delta}^{++}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ 1  From partial wave analysis including all possible combinations of 0${}^{++}$, 2${}^{++}$, and 4${}^{++}$ resonances. 2  Breit-Wigner mass. Could also be the ${{\mathit f}_{{{2}}}{(1910)}}$. 3  Seen in only one solution. 4  Error increased by spread of two solutions. Included in LONGACRE 1986 global analysis. 5  T-matrix pole, 4 poles, 4 channels, including scattering data from HYAMS 1975 (${{\mathit \pi}}{{\mathit \pi}}$), LONGACRE 1986 (${{\mathit K}}{{\overline{\mathit K}}}$), BINON 1983 (${{\mathit \eta}}{{\mathit \eta}}$). 6  From a partial-wave analysis of data using a K-matrix formalism with 5 poles. Includes compilation of several other experiments. 7  From an amplitude analysis of the reaction ${{\mathit \pi}^{+}}$ ${{\mathit \pi}^{-}}$ $\rightarrow$ 2 ${{\mathit \pi}^{0}}$. The resonance in the 2${{\mathit \pi}^{0}}$ final state is not confirmed by PROKOSHKIN 1997.

${{\mathit f}_{{{2}}}{(1810)}}$ mass (MeV)

References