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

INSPIRE   PDGID:
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
2001B
B852 18 GeV ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}{{\mathit n}}$
$1282$ $\pm5$ 9082
MANAK
2000A
MPS 18 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$
$1299$ $\pm4$ 2100
ALDE
1997B
GAM4 100 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit n}}$
$1295$ $\pm4$
FUKUI
1991C
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