${{\mathit f}_{{{0}}}{(2020)}}$ WIDTH

INSPIRE   JSON  (beta) PDGID:
M156W
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$436$ $\pm4$ ${}^{+46}_{-49}$ 1
ABLIKIM
2022C
 BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}^{\,'}}{{\mathit \eta}^{\,'}}$ $\rightarrow$ 4 ${{\mathit \gamma}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$)
• • We do not use the following data for averages, fits, limits, etc. • •
$203$ $\pm9$ ${}^{+13}_{-11}$ 2
ABLIKIM
2022AS
 BES3 ${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}}{{\mathit \eta}^{\,'}}$
$296$ $\pm17$ 80k 3
UMAN
2006
E835 5.2 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \eta}}{{\mathit \pi}^{0}}$
$405$ $\pm40$
ANISOVICH
2000J
 SPEC
$240$ $\pm100$
ALDE
1998
GAM4 100 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit n}}$
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 a Breit-Wigner fit involving 9 resonances and a resonating exotic ${{\mathit \eta}_{{{1}}}{(1855)}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \eta}^{\,'}}{\mathit P}{\mathrm -wave}$.
3  Statistical error only.
References