${{\mathit f}_{{{2}}}{(2340)}}$ MASS

INSPIRE   JSON  (beta) PDGID:
M108M
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 2346 {}^{+21}_{-10}}$ OUR AVERAGE
$2346$ $\pm8$ ${}^{+22}_{-6}$ 1
ABLIKIM
2022C
 BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}^{\,'}}{{\mathit \eta}^{\,'}}$ $\rightarrow$ 4 ${{\mathit \gamma}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$)
$2362$ ${}^{+31}_{-30}$ ${}^{+140}_{-63}$ 5.5k 2
ABLIKIM
2013N
 BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}}{{\mathit \eta}}$
$2339$ $\pm55$ 3
ETKIN
1988
MPS 22 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \phi}}{{\mathit n}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$2350$ $\pm7$ 80k 4
UMAN
2006
E835 5.2 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \eta}}{{\mathit \pi}^{0}}$
$2412$ ${}^{+28}_{-32}$ 5
LONGACRE
2004
RVUE 22 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \phi}}{{\mathit n}}$, 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{{f}}}}$4 ${{\mathit \pi}}{{\mathit p}_{{{s}}}}$
$2392$ $\pm10$
BOOTH
1986
OMEG 85 ${{\mathit \pi}^{-}}$ ${}^{}\mathrm {Be}$ $\rightarrow$ 2 ${{\mathit \phi}}{}^{}\mathrm {Be}$
$2360$ $\pm20$
LINDENBAUM
1984
RVUE
1  From a partial wave analysis of the systems (${{\mathit \gamma}}{{\mathit X}}$), with ${{\mathit X}}$ $\rightarrow$ ${{\mathit \eta}^{\,'}}{{\mathit \eta}^{\,'}}$, and (${{\mathit \eta}^{\,'}}{{\mathit X}}$), with ${{\mathit X}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}^{\,'}}$ in the decay ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}^{\,'}}{{\mathit \eta}^{\,'}}$. The intermediate resonance ${{\mathit X}}$ is parametrized by a constant-width, relativistic Breit-Wigner.
2  From partial wave analysis including all possible combinations of 0${}^{++}$, 2${}^{++}$, and 4${}^{++}$ resonances.
3  Includes data of ETKIN 1985. The percentage of the resonance going into ${{\mathit \phi}}{{\mathit \phi}}{}^{}2{}^{++}$ $\mathit S_{2}$, $\mathit D_{2}$, and $\mathit D_{0}$ is $37$ $\pm19$, $4$ ${}^{+12}_{-4}$, and $59$ ${}^{+21}_{-19}$, respectively.
4  Statistical error only.
5  From a four pole K-matrix reanalysis of ETKIN 1988 and BARBERIS 2000C data.
References