${{\boldsymbol \pi}_{{1}}{(1400)}}$ MASS INSPIRE search

VALUE (MeV) EVTS DOCUMENT ID TECN CHG  COMMENT
$\bf{ 1354 \pm25}$ OUR AVERAGE  Error includes scale factor of 1.8.
$1257$ $\pm20$ $\pm25$ 23.5k
ADAMS
2007B
 B852 18 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{0}}{{\mathit n}}$
$1384$ $\pm20$ $\pm35$ 90k
SALVINI
2004
OBLX ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ 2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}$
$1360$ $\pm25$
ABELE
1999
CBAR $0.0$ ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \eta}}$
$1400$ $\pm20$ $\pm20$
ABELE
1998B
 CBAR 0.0 ${{\overline{\mathit p}}}$ ${{\mathit n}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit \eta}}$
$1370$ $\pm16$ ${}^{+50}_{-30}$ 1
THOMPSON
1997
MPS 18 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{-}}{{\mathit p}}$
• • • We do not use the following data for averages, fits, limits, etc. • • •
$1323.1$ $\pm4.6$ 2
AOYAGI
1993
BKEI ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{-}}{{\mathit p}}$
$1406$ $\pm20$ 3
ALDE
1988B
 GAM4 0 100 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{0}}{{\mathit n}}$
1  Natural parity exchange, questioned by DZIERBA 2003 .
2  Unnatural parity exchange.
3  Seen in the ${\mathit P}_{\mathrm 0}{\mathrm -wave}$ intensity of the ${{\mathit \eta}}{{\mathit \pi}^{0}}$ system, unnatural parity exchange.

           ${{\mathit \pi}_{{1}}{(1400)}}$ MASS (MeV)
  References:
ADAMS 2007B
PL B657 27 Confirmation of the $1-{}^{+}{}^{}$ Meson Exotics in the ${{\mathit \eta}}{{\mathit \pi}^{0}}$ System
SALVINI 2004
EPJ C35 21 ${{\overline{\mathit p}}}{{\mathit p}}$ Annihilation into Four Charged Pions at Rest and in Flight
ABELE 1999
PL B446 349 Evidence for a ${{\mathit \pi}}{{\mathit \eta}}$ ${\mathit P}{\mathrm -wave}$ in ${{\overline{\mathit p}}}{{\mathit p}}$ Annihilations at Rest into ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \eta}}$
ABELE 1998B
PL B423 175 Exotic ${{\mathit \eta}}{{\mathit \pi}}$ State in ${{\overline{\mathit p}}}{{\mathit d}}$ Annihilation at Rest into ${{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit p}}_{spect.}$
THOMPSON 1997
PRL 79 1630 Evidence for Exotic Meson Production in the Reaction ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{-}}{{\mathit p}}$ at 18 ${\mathrm {GeV/}}\mathit c$
AOYAGI 1993
PL B314 246 Study of the ${{\mathit \eta}}{{\mathit \pi}^{-}}$ System in the ${{\mathit \pi}^{-}}{{\mathit p}}$ Reaction at 6.3 ${\mathrm {GeV/}}\mathit c$
ALDE 1988B
PL B205 397 Evidence for a $1-{}^{+}{}^{}$ Exotic Meson