${{\boldsymbol \eta}}{{\boldsymbol \eta}}$ MODE INSPIRE search

VALUE (MeV) DOCUMENT ID TECN  COMMENT
• • • We do not use the following data for averages, fits, limits, etc. • • •
$484$ ${}^{+246}_{-170}$ ${}^{+246}_{-263}$ 1
 2010 A
BELL 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \eta}}{{\mathit \eta}}$
$250$
 1992
CBAR 0.0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$
$320$ $\pm40$
 1986 D
GAM4 100 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}$2 ${{\mathit \eta}}$
1  Breit-Wigner width. May also be the ${{\mathit f}_{{0}}{(1500)}}$.
References:
 UEHARA 2010A
PR D82 114031 Measurement of ${{\mathit \eta}}{{\mathit \eta}}$ Production in Two-Photon Collisions
 AMSLER 1992
PL B291 347 Proton Antiproton Annihilation into ${{\mathit \eta}}{{\mathit \eta}}{{\mathit \pi}}$: Observation of a Scalar Resonance Decaying into ${{\mathit \eta}}{{\mathit \eta}}$
 ALDE 1986D
NP B269 485 Production of ${{\mathit G}{(1590)}}$ and other Mesons Decaying into ${{\mathit \eta}}$ Pairs by 100 ${\mathrm {GeV/}}\mathit c$ ${{\mathit \pi}^{-}}$ on Protons