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${{\mathit \eta}{(1295)}}$ MASS

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M037M

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT $\bf{ 1294 \pm4}$ OUR AVERAGE  Error includes scale factor of 1.6.  See the ideogram below. $1302$ $\pm9$ $\pm8$ 20k ADAMS 2001 B B852 18 GeV ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}{{\mathit n}}$ $1282$ $\pm5$ 9082 MANAK 2000 A MPS 18 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$ $1299$ $\pm4$ 2100 ALDE 1997 B GAM4 100 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit n}}$ $1295$ $\pm4$ FUKUI 1991 C SPEC 8.95 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$ • • We do not use the following data for averages, fits, limits, etc. • • $1264$ $\pm8$ 1 AUGUSTIN 1990 DM2 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $\sim$$1275$ STANTON 1979 CNTR 8.4 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}{{\mathit \eta}}$2 ${{\mathit \pi}}$ 1  PWA analysis of AUGUSTIN 1992 assigns 0${}^{-+}$ quantum numbers to this state rather than 1${}^{++}$ as before.

${{\mathit \eta}{(1295)}}$ mass (MeV)

References