${{\mathit a}_{{{2}}}{(1700)}}$ MASS

INSPIRE   JSON  (beta) PDGID:
M162M
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 1706 \pm14}$ OUR AVERAGE  Error includes scale factor of 1.2.
$1681$ ${}^{+22}_{-35}$ 46M 1, 2
AGHASYAN
2018B
 COMP 190 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit p}}$
$1726$ $\pm12$ $\pm25$ 2
ABLIKIM
2017K
 BES3 ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$1722$ $\pm9$ $\pm15$ 18k 3
SCHEGELSKY
2006
RVUE ${{\mathit \gamma}}$ ${{\mathit \gamma}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
$1660$ $\pm40$ 2
ABELE
1999B
 CBAR $1.94$ ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$1720$ $\pm10$ $\pm60$ 4
JACKURA
2018
RVUE ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{-}}{{\mathit p}}$
$1675$ $\pm25$
ANISOVICH
2009
RVUE 0.0 ${{\overline{\mathit p}}}{{\mathit p}}$, ${{\mathit \pi}}{{\mathit N}}$
$1702$ $\pm7$ 80k 5
UMAN
2006
E835 5.2 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \eta}}{{\mathit \pi}^{0}}$
$1721$ $\pm13$ $\pm44$ 145k
LU
2005
B852 18 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit p}}$
$1737$ $\pm5$ $\pm7$
ABE
2004
BELL 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}$
$1767$ $\pm14$ 221 6
ACCIARRI
2001H
 L3 ${{\mathit \gamma}}$ ${{\mathit \gamma}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ , ${\it{}E}^{\it{}ee}_{\rm{}cm}$= 91, $183 - 209$ GeV
$\sim$$1775$ 7
GRYGOREV
1999
SPEC 40 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit n}}$
$1752$ $\pm21$ $\pm4$
ACCIARRI
1997T
 L3 ${{\mathit \gamma}}$ ${{\mathit \gamma}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
1  Statistical error negligible.
2  Breit-Wigner mass.
3  From analysis of L3 data at $183 - 209$ GeV.
4  Superseded by RODAS 2019.
5  Statistical error only.
6  Spin 2 dominant, isospin not determined, could also be $\mathit I$=1.
7  Possibly two $\mathit J{}^{P} = 2{}^{+}$ resonances with isospins 0 and 1.
References