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

${{\mathit \eta}}{{\mathit \pi}}{{\mathit \pi}}$ MODE

INSPIRE   PDGID:
M027M1
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 1405.8 \pm2.6}$ OUR AVERAGE  Error includes scale factor of 2.3.  See the ideogram below.
$1409.0$ $\pm1.7$ 743
ABLIKIM
2012E
 BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}$( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$)
$1407.0$ $\pm3.5$ 198
ABLIKIM
2012E
 BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}$( ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$)
$1399.8$ $\pm2.2$ ${}^{+2.8}_{-0.1}$ 1
ABLIKIM
2011J
 BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \omega}}$ ( ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ )
$1392$ $\pm14$ $900$ $\pm375$
AMSLER
2004B
 CBAR 0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \eta}}$
$1394$ $\pm8$ $6.6$ $\pm2.0$k
AMSLER
2004B
 CBAR 0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \eta}}$
$1404$ $\pm6$ 9082
MANAK
2000A
 MPS 18 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$
$1424$ $\pm6$ 2200
ALDE
1997B
 GAM4 100 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit n}}$
$1400$ $\pm6$ 2
BOLTON
1992B
 MRK3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$1388$ $\pm4$
FUKUI
1991C
 SPEC 8.95 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$
$1398$ $\pm6$ 261 3
AUGUSTIN
1990
DM2 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$1420$ $\pm5$
ANDO
1986
SPEC 8 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$1404.0$ $\pm11.0$ 195
ABLIKIM
2019BA
 BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \psi}{(2S)}}$
$1385$ $\pm7$
BAI
1999
BES ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$1409$ $\pm3$ 4
AMSLER
1995F
 CBAR 0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \eta}}$
1  The selected process is ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit a}_{{0}}{(980)}}{{\mathit \pi}}$ .
2  From fit to the ${{\mathit a}_{{0}}{(980)}}{{\mathit \pi}}$ ${}^{}0{}^{-+}$ partial wave.
3  Best fit with a single Breit Wigner.
4  Superseded by AMSLER 04B.

           ${{\mathit \eta}{(1405)}}$ mass, ${{\mathit \eta}}{{\mathit \pi}}{{\mathit \pi}}$ mode (MeV)
References:
ABLIKIM 2019BA
PR D100 092003 Measurement of branching fractions of $\psi(3686)\to \phi\eta^\prime, \phi f_1(1285)$ and $\phi \eta(1405)$
ABLIKIM 2012E
PRL 108 182001 First Observation of ${{\mathit \eta}{(1405)}}$ Decays into ${{\mathit f}_{{0}}{(980)}}{{\mathit \pi}^{0}}$
ABLIKIM 2011J
PRL 107 182001 ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ Resonant Structure Around 1.8 GeV/$\mathit c{}^{2}$ and ${{\mathit \eta}{(1405)}}$ in ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
AMSLER 2004B
EPJ C33 23 Production and Decay of ${{\mathit \eta}^{\,'}{(958)}}$ and ${{\mathit \eta}{(1440)}}$ in ${{\overline{\mathit p}}}{{\mathit p}}$ Annihilation at Rest
MANAK 2000A
PR D62 012003 Partial-Wave Analysis of the ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ System Produced in the Reaction ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$ at 18 ${\mathrm {GeV/}}\mathit c$
BAI 1999
PL B446 356 Partial Wave Analysis of ${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}$( ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$)
ALDE 1997B
PAN 60 386 Spin Parity Analysis of ${{\mathit \eta}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ System in ${{\mathit \pi}^{-}}{{\mathit p}}$ Charge Exchange Reaction at 100 ${\mathrm {GeV/}}\mathit c$ by Zemach Method
AMSLER 1995F
PL B358 389 ${{\mathit E}}$ Decays to ${{\mathit \eta}}{{\mathit \pi}}{{\mathit \pi}}$ in ${{\overline{\mathit p}}}{{\mathit p}}$ Annihilation at Rest
BOLTON 1992B
PRL 69 1328 Partial Wave Analysis of ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
FUKUI 1991C
PL B267 293 Study of ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ System in the ${{\mathit \pi}^{-}}{{\mathit p}}$ Charge Exchange Reaction at 8.95 ${\mathrm {GeV/}}\mathit c$
AUGUSTIN 1990
PR D42 10 Radiative Decay of ${{\mathit J / \psi}}$ into ${{\mathit \eta}{(1430)}}$ and Nearby States
ANDO 1986
PRL 57 1296 Evidence for Two Pseudoscalar Resonances of ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ System in the ${{\mathit D}{(1285)}}$ and $\mathit E/l$ Regions