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${{\mathit f}_{{{0}}}{(980)}}$ T-MATRIX POLE $\sqrt {\mathit s }$

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M003PP

Note that $\Gamma $ = $−$2 Im($\sqrt {s }$).

VALUE (MeV) DOCUMENT ID TECN  COMMENT $\bf{ (980 - 1010) − {\mit i} (20 - 35)}$ OUR ESTIMATE  (see Fig. 64.4 in the review) $(993 \pm2 {}^{+2}_{-1}) − {\mit i}(21 \pm3 {}^{+2}_{-4})$ 1 DANILKIN 2021 RVUE Compilation $(1014 \pm8)−{\mit i}(35 \pm5)$ SARANTSEV 2021 RVUE ${{\mathit J / \psi}{(1S)}}$ $\rightarrow$ ${{\mathit \gamma}}$ (${{\mathit \pi}}{{\mathit \pi}}$ , ${{\mathit K}}{{\overline{\mathit K}}}$ , ${{\mathit \eta}}{{\mathit \eta}}$ , ${{\mathit \omega}}{{\mathit \phi}}$) $(992.8 \pm1.3) − {\mit i}(30.7 \pm2.3)$ 2 ALBRECHT 2020 RVUE 0.9 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \eta}}$ , ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$ , ${{\mathit \pi}^{0}}{{\mathit K}^{+}}{{\mathit K}^{-}}$ $(1003 {}^{+5}_{-27}) − {\mit i}(21 {}^{+10}_{-8})$ 3 GARCIA-MARTIN 2011 RVUE Compilation $(996 \pm7) − {\mit i}(25 {}^{+10}_{-6})$ 4 GARCIA-MARTIN 2011 RVUE Compilation $(996 {}^{+4}_{-14}) − {\mit i}(24 {}^{+11}_{-3})$ 5 MOUSSALLAM 2011 RVUE Compilation $(981 \pm43) − {\mit i}(18 \pm11)$ 6 MENNESSIER 2010 RVUE Compilation $(1030 {}^{+30}_{-10}) − {\mit i}(35 {}^{+10}_{-16})$ 7 ANISOVICH 2009 RVUE 0.0 ${{\overline{\mathit p}}}{{\mathit p}}$, ${{\mathit \pi}}{{\mathit N}}$ $(973 {}^{+39}_{-127}) − {\mit i}(11 {}^{+189}_{-11})$ 8 PELAEZ 2004 A RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ 1  Data driven analysis using partial-wave dispersion relations . 2  5 poles, 5 channels, including scattering data from HYAMS 1975 (${{\mathit \pi}}{{\mathit \pi}}$), LONGACRE 1986 (${{\mathit K}}{{\overline{\mathit K}}}$), BINON 1983 (${{\mathit \eta}}{{\mathit \eta}}$), and BINON 1984C (${{\mathit \eta}}{{\mathit \eta}^{\,'}}$). Based on 18.5k events. Second solution $977.8$ $\pm1.7$ MeV. 3  Reanalysis of the ${{\mathit K}_{{{e4}}}}$ data of BATLEY 2010C and the ${{\mathit \pi}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}{{\mathit N}}$ data of HYAMS 1973, GRAYER 1974, and PROTOPOPESCU 1973 using Roy equations. 4  Reanalysis of the ${{\mathit K}_{{{e4}}}}$ data of BATLEY 2010C and the ${{\mathit \pi}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}{{\mathit N}}$ data of HYAMS 1973, GRAYER 1974, and PROTOPOPESCU 1973 using GKPY equations. 5  Uses Roy equations. 6  Average of the analyses of three data sets in the K-matrix model. Uses the data of BATLEY 2008A, HYAMS 1973 , and GRAYER 1974 , partially of COHEN 1980 or ETKIN 1982B. 7  On sheet II in a 2-pole solution. The other pole is found on sheet III at (850 $−$ ${\mit i}$ 100) MeV. 8  Reanalysis of data from PROTOPOPESCU 1973, ESTABROOKS 1974, GRAYER 1974, and COHEN 1980 in the unitarized ChPT model.

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