${{\mathit f}_{{2}}{(1950)}}$ T-MATRIX POLE $\sqrt {\mathit s }$

INSPIRE   PDGID:
M135PP
Note that $\Gamma \approx{}$2 Im($\sqrt {s }$).
VALUE (MeV) DOCUMENT ID TECN  COMMENT
$\bf{ (1830 - 2020) − {\mit i} (110 - 220)}$ OUR ESTIMATE
$(1955 \pm75) − {\mit i} (175 \pm57)$ 1
RODAS
2022
RVUE ${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}$ ( ${{\mathit \pi}}{{\mathit \pi}}$ , ${{\mathit K}}{{\overline{\mathit K}}}$ )
$(1978.2 \pm1.8 {}^{+28.4}_{-16.9}) − {\mit i} (118.8 \pm0.8 {}^{+20.8}_{-7.8})$ 2
ALBRECHT
2020
RVUE 0.9 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \eta}}$ , ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$ , ${{\mathit \pi}^{0}}{{\mathit K}^{+}}{{\mathit K}^{-}}$
$(1867 \pm46) − {\mit i} (193 \pm29)$
AMSLER
2002
CBAR $0.9$ ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$ , ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
1  T-matrix pole from coupled channel K-matrix fit to data on ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ (ABLIKIM 2015AE) and ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ (ABLIKIM 2018AA).
2  T-matrix pole, 4 poles, 4 channels, including scattering data from HYAMS 1975 ( ${{\mathit \pi}}{{\mathit \pi}}$ ), LONGACRE 1986 ( ${{\mathit K}}{{\overline{\mathit K}}}$ ), BINON 1983 ( ${{\mathit \eta}}{{\mathit \eta}}$ ).
References:
RODAS 2022
EPJ C82 80 Scalar and tensor resonances in $J/\psi $ radiative decays
ALBRECHT 2020
EPJ C80 453 Coupled channel analysis of ${\bar{p}p}\,\rightarrow \,\pi ^0\pi ^0\eta $, ${\pi ^0\eta \eta }$ and ${K^+K^-\pi ^0}$ at 900 MeV/c and of ${\pi \pi }$-scattering data
AMSLER 2002
EPJ C23 29 Proton-Antiproton Annihilation at 900 ${\mathrm {MeV}}/\mathit c$ into ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$, ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \eta}}$, and ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$