${{\mathit \eta}{(1475)}}$ MASS

INSPIRE   PDGID:
M175M5
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 1476 \pm4}$ OUR AVERAGE  Error includes scale factor of 1.4.  See the ideogram below.
$1507.6$ $\pm1.6$ ${}^{+15.5}_{-32.2}$ 126K 1
ABLIKIM
2023M
BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit \pi}^{0}}$
$1469$ $\pm14$ $\pm13$ 74
ACHARD
2007
L3 $183 - 209$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\mp}}$
$1460$ $\pm12$ 3651
NICHITIU
2002
OBLX 0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
$1485$ $\pm8$ $\pm5$ 20k
ADAMS
2001B
B852 18 GeV ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}{{\mathit n}}$
$1500$ $\pm10$
CICALO
1999
OBLX 0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{\pm}}{{\mathit K}_S^0}$ ${{\mathit \pi}^{\mp}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$1464$ $\pm10$
BERTIN
1997
OBLX 0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{\pm}}$( ${{\mathit K}^{0}}$) ${{\mathit \pi}^{\mp}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$1460$ $\pm10$
BERTIN
1995
OBLX 0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}{{\mathit \pi}}{{\mathit \pi}}$
$1490$ ${}^{+14}_{-8}$ ${}^{+3}_{-16}$ 1100
BAI
1990C
MRK3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\mp}}$
$1475$ $\pm4$
RATH
1989
MPS 21.4 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}{{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit \pi}^{0}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$1477$ $\pm7$ $\pm13$ 2
ABLIKIM
2018I
BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \phi}{(1020)}}$
$1565$ $\pm8$ ${}^{+0}_{-63}$ 3
ABLIKIM
2015T
BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit \eta}}$
$1421$ $\pm14$
AUGUSTIN
1992
DM2 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$
1  ABLIKIM 2023M reports for this state a significance from the fit much higher than 35 $\sigma $.
2  From a fit to ${{\mathit \gamma}}{{\mathit \phi}}$ invariant mass. Angular analysis consistent with $\mathit J{}^{PC} = 0{}^{-+}$. Other $\mathit J{}^{PC}$ not excluded.
3  Could also be the ${{\mathit \eta}{(1405)}}$.

           ${{\mathit \eta}{(1475)}}$ mass (MeV)
References