${{\mathit \eta}_{{2}}{(1870)}}$ MASS

INSPIRE   PDGID:
M101M
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 1842 \pm8}$ OUR AVERAGE
$1835$ $\pm12$
BARBERIS
2000B
 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{f}}}{{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit p}_{{s}}}$
$1844$ $\pm13$
BARBERIS
2000C
 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{f}}}$4 ${{\mathit \pi}}{{\mathit p}_{{s}}}$
$1840$ $\pm25$
BARBERIS
1997B
 OMEG 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$)
$1875$ $\pm20$ $\pm35$
ADOMEIT
1996
CBAR 1.94 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}$3 ${{\mathit \pi}^{0}}$
$1881$ $\pm32$ $\pm40$ $26$
KARCH
1992
CBAL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \eta}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$1860$ $\pm5$ $\pm15$
ANISOVICH
2000E
 SPEC $0.9 - 1.94$ ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}$3 ${{\mathit \pi}^{0}}$
$1840$ $\pm15$
BAI
1999
BES ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
References:
ANISOVICH 2000E
PL B477 19 Three $\mathit I = 0$ $\mathit J{}^{PC} = 2-+$ Mesons
BARBERIS 2000B
PL B471 435 A Study of the ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ Channel Produced in Central ${{\mathit p}}{{\mathit p}}$ Interactions at 450 ${\mathrm {GeV/}}\mathit c$
BARBERIS 2000C
PL B471 440 A Spin Analysis of the 4${{\mathit \pi}}$ Channels Produced in Central ${{\mathit p}}{{\mathit p}}$ Interactions at 450 ${\mathrm {GeV/}}\mathit c$
BAI 1999
PL B446 356 Partial Wave Analysis of ${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}$( ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$)
BARBERIS 1997B
PL B413 217 A Study of the Centrally Produced ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ Channel in ${{\mathit p}}{{\mathit p}}$ Interactions at 450 ${\mathrm {GeV/}}\mathit c$
ADOMEIT 1996
ZPHY C71 227 Evidence for Two Isospin Zero $\mathit J{}^{PC} = 2{}^{-+}$ Mesons at 1645 and 1875 MeV
KARCH 1992
ZPHY C54 33 Analysis of the ${{\mathit \eta}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ Final State in Photon Photon Collisions