${{\mathit \eta}{(1405)}}$ MASS

${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$ MODE (${{\mathit a}_{{{0}}}{(980)}}{{\mathit \pi}}$ or direct ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$)

INSPIRE   PDGID:
M027M4
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 1413.5 {}^{+2.0}_{-0.9}}$ OUR AVERAGE  Error includes scale factor of 1.3.  See the ideogram below.
$1391.7$ $\pm0.7$ ${}^{+11.3}_{-0.3}$ 126k 1
ABLIKIM
2023M
 BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit \pi}^{0}}$
$1413$ $\pm14$ 3651 2
NICHITIU
2002
OBLX 0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
$1416$ $\pm4$ $\pm2$ 20k
ADAMS
2001B
 B852 18 GeV ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}{{\mathit n}}$
$1405$ $\pm5$ 3
CICALO
1999
OBLX 0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{\pm}}{{\mathit K}_S^0}$ ${{\mathit \pi}^{\mp}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$1407$ $\pm5$ 3
BERTIN
1997
OBLX 0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{\pm}}$( ${{\mathit K}^{0}}$) ${{\mathit \pi}^{\mp}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$1416$ $\pm2$ 3
BERTIN
1995
OBLX 0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}{{\mathit \pi}}{{\mathit \pi}}$
$1416$ $\pm8$ ${}^{+7}_{-5}$ 700 4
BAI
1990C
 MRK3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\mp}}$
$1413$ $\pm5$ 4
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. • •
$1459$ $\pm5$ 5
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  Decaying dominantly directly to ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$.
3  Decaying into (${{\mathit K}}{{\overline{\mathit K}}})_{\mathit S}{{\mathit \pi}}$, (${{\mathit K}}{{\mathit \pi}})_{\mathit S}{{\overline{\mathit K}}}$, and ${{\mathit a}_{{{0}}}{(980)}}{{\mathit \pi}}$.
4  From fit to the ${{\mathit a}_{{{0}}}{(980)}}{{\mathit \pi}}{}^{}0{}^{-+}$ partial wave. Cannot rule out a ${{\mathit a}_{{{0}}}{(980)}}{{\mathit \pi}}{}^{}1{}^{++}$ partial wave.
5  Excluded from averaging because averaging would be meaningless.

           ${{\mathit \eta}{(1405)}}$ mass, ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$ mode (${{\mathit a}_{{{0}}}{(980)}}{{\mathit \pi}}$ dominant) (MeV)
References