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${{\mathit f}_{{{0}}}{(980)}}$ WIDTH

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M003W1

Width determination very model dependent. Peak width in ${{\mathit \pi}}{{\mathit \pi}}$ is about 50 MeV, but decay width can be much larger.

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT $\bf{ 10\text{ to }100 }$ OUR ESTIMATE • • We do not use the following data for averages, fits, limits, etc. • • $15.3$ $\pm4.7$ 424 ABLIKIM 2015 P BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$3 ${{\mathit \pi}}$ $9.5$ $\pm1.1$ 706 ABLIKIM 2012 E BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}$3 ${{\mathit \pi}}$ $91$ ${}^{+30}_{-22}$ $\pm3$ 44 1 ECKLUND 2009 CLEO 4.17 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit D}_{{{s}}}^{-}}{{\mathit D}_{{{s}}}^{*+}}$ + c.c. $66.9$ $\pm2.2$ ${}^{+17.6}_{-12.5}$ 2 UEHARA 2008 A BELL 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ $65$ $\pm13$ $262$ $\pm30$ 3 AUBERT 2007 AK BABR 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$ $81$ $\pm21$ $54$ $\pm9$ 3 AUBERT 2007 AK BABR 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$ $51.3$ ${}^{+20.8}_{-17.7}$ ${}^{+13.2}_{-3.8}$ 4 MORI 2007 BELL 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $61$ $\pm9$ ${}^{+14}_{-8}$ 2584 5 GARMASH 2005 BELL ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $64$ $\pm16$ 6 ANISOVICH 2003 RVUE $121$ $\pm23$ TIKHOMIROV 2003 SPEC 40.0 ${{\mathit \pi}^{-}}$ ${}^{}\mathrm {C}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$ X $\sim{}\text{ 70}$ 7 BRAMON 2002 RVUE $1.02$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$ $44$ $\pm2$ $\pm2$ 848 8 AITALA 2001 A E791 ${{\mathit D}_{{{s}}}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{+}}$ $201$ $\pm28$ 419 9 ACHASOV 2000 H SND ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$ $122$ $\pm13$ 419 10, 11 ACHASOV 2000 H SND ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$ $56$ $\pm20$ 12 AKHMETSHIN 1999 C CMD2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$ $65$ $\pm20$ BARBERIS 1999 OMEG 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{{s}}}}{{\mathit p}_{{{f}}}}{{\mathit K}^{+}}{{\mathit K}^{-}}$ $80$ $\pm10$ BARBERIS 1999 B OMEG 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{{s}}}}{{\mathit p}_{{{f}}}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $80$ $\pm10$ BARBERIS 1999 C OMEG 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{{s}}}}{{\mathit p}_{{{f}}}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ $48$ $\pm12$ $\pm8$ 13 BARBERIS 1999 D OMEG 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$, ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $65$ $\pm25$ BELLAZZINI 1999 GAM4 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ $71$ $\pm14$ 14 KAMINSKI 1999 RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$, ${{\mathit K}}{{\overline{\mathit K}}}$, ${{\mathit \sigma}}{{\mathit \sigma}}$ $\sim{}\text{ 28}$ 14 OLLER 1999 RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$, ${{\mathit K}}{{\overline{\mathit K}}}$ $\sim{}\text{ 25}$ OLLER 1999 B RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$, ${{\mathit K}}{{\overline{\mathit K}}}$ $\sim{}\text{ 14}$ 14 OLLER 1999 C RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$, ${{\mathit K}}{{\overline{\mathit K}}}$, ${{\mathit \eta}}{{\mathit \eta}}$ $70$ $\pm20$ ALDE 1998 GAM4 $86$ $\pm16$ 14 ANISOVICH 1998 B RVUE Compilation $54$ 15 LOCHER 1998 RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ , ${{\mathit K}}{{\overline{\mathit K}}}$ $69$ $\pm15$ 16 ALDE 1997 GAM2 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ $38$ $\pm20$ 17 BERTIN 1997 C OBLX 0.0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ $\sim{}\text{ 100}$ 18 ISHIDA 1996 RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$, ${{\mathit K}}{{\overline{\mathit K}}}$ $34$ TORNQVIST 1996 RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$, ${{\mathit K}}{{\overline{\mathit K}}}$, ${{\mathit K}}{{\mathit \pi}}$, ${{\mathit \eta}}{{\mathit \pi}}$ $48$ $\pm10$ 3k 19 ALDE 1995 B GAM2 38 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit n}}$ $95$ $\pm20$ 10k 20 ALDE 1995 B GAM2 38 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit n}}$ $26$ $\pm10$ AMSLER 1995 B CBAR $0.0$ ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ 3 ${{\mathit \pi}^{0}}$ $\sim{}\text{ 112}$ 21 AMSLER 1995 D CBAR 0.0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$, ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$, ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \eta}}$ $80$ $\pm12$ 22 ANISOVICH 1995 RVUE $30$ JANSSEN 1995 RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$, ${{\mathit K}}{{\overline{\mathit K}}}$ $74$ 23 BUGG 1994 RVUE ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}$2 ${{\mathit \pi}^{0}}$ $29$ $\pm2$ 24 KAMINSKI 1994 RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$, ${{\mathit K}}{{\overline{\mathit K}}}$ $46$ 25 ZOU 1994 B RVUE $48$ $\pm12$ 26 MORGAN 1993 RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ ${{\mathit K}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$( ${{\mathit K}}{{\overline{\mathit K}}}$), ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \pi}}{{\mathit \pi}}$( ${{\mathit K}}{{\overline{\mathit K}}}$), ${{\mathit D}_{{{s}}}}$ $\rightarrow$ ${{\mathit \pi}}$( ${{\mathit \pi}}{{\mathit \pi}}$) $37.4$ $\pm10.6$ 16 AGUILAR-BENIT.. 1991 EHS 400 ${{\mathit p}}{{\mathit p}}$ $72$ $\pm8$ 27 ARMSTRONG 1991 OMEG 300 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}{{\mathit \pi}}{{\mathit \pi}}$ , ${{\mathit p}}{{\mathit p}}{{\mathit K}}{{\overline{\mathit K}}}$ $110$ $\pm30$ BREAKSTONE 1990 SFM ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $29$ $\pm13$ 16 ABACHI 1986 B HRS ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ X $120$ $\pm281$ $\pm20$ ETKIN 1982 B MPS 23 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}$2 ${{\mathit K}_S^0}$ $28$ $\pm10$ 27 GIDAL 1981 MRK2 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ X $70\text{ to }300 $ 28 ACHASOV 1980 RVUE $100$ $\pm80$ 29 AGUILAR-BENIT.. 1978 HBC 0.7 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ $30$ $\pm8$ 27 LEEPER 1977 ASPK 2$-$2.4 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$ , ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit n}}$ $48$ $\pm14$ 27 BINNIE 1973 CNTR ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}$ MM $32$ $\pm10$ 30 GRAYER 1973 ASPK 17 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$ $30$ $\pm10$ 30 HYAMS 1973 ASPK 17 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$ $54$ $\pm16$ 30 PROTOPOPESCU 1973 HBC 7 ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit p}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ 1  Using a relativistic Breit-Wigner function and taking into account the finite ${{\mathit D}_{{{s}}}}$ mass. 2  Breit-Wigner ${{\mathit \pi}}{{\mathit \pi}}$ width. Using finite width corrections according to FLATTE 1976 and ACHASOV 2005, and the ratio $\mathit g_{{{\mathit f}_{{{0}}}} {{\mathit K}} {{\mathit K}}}/\mathit g_{{{\mathit f}_{{{0}}}} {{\mathit \pi}} {{\mathit \pi}}}$ = 0. 3  Systematic errors not estimated. 4  Breit-Wigner ${{\mathit \pi}}{{\mathit \pi}}$ width. Using finite width corrections according to FLATTE 1976 and ACHASOV 2005, and the ratio $\mathit g_{{{\mathit f}_{{{0}}}} {{\mathit K}} {{\mathit K}}}/\mathit g_{{{\mathit f}_{{{0}}}} {{\mathit \pi}} {{\mathit \pi}}}$ = $4.21$ $\pm0.25$ $\pm0.21$ from ABLIKIM 2005. 5  Breit-Wigner, solution 1, PWA ambiguous. 6  K-matrix pole from combined analysis of ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit n}}$, ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit n}}$, ${{\mathit \pi}^{+}}$ ${{\mathit \pi}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$, ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$, ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$, ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \eta}}$, ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$, ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$, ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit \pi}^{0}}$, ${{\mathit K}^{+}}{{\mathit K}_S^0}$ ${{\mathit \pi}^{-}}$ at rest, ${{\overline{\mathit p}}}$ ${{\mathit n}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}$, ${{\mathit K}_S^0}$ ${{\mathit K}^{-}}{{\mathit \pi}^{0}}$, ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit \pi}^{-}}$ at rest. 7  Using the data of AKHMETSHIN 1999C, ACHASOV 2000H, and ALOISIO 2002D. 8  Breit-Wigner width. 9  Supersedes ACHASOV 1998I. Using the model of ACHASOV 1989. 10  Supersedes ACHASOV 1998I. 11  In the ``narrow resonance'' approximation. 12  From the combined fit of the photon spectra in the reactions ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$, ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$. 13  Supersedes BARBERIS 1999 and BARBERIS 1999B 14  T-matrix pole. 15  On sheet II in a 2 pole solution. The other pole is found on sheet$~$III at (1039$−93\mathit i$) MeV. 16  From invariant mass fit. 17  On sheet II in a 2 pole solution. The other pole is found on sheet III at (963-29i) MeV. 18  Reanalysis of data from HYAMS 1973, GRAYER 1974, SRINIVASAN 1975, and ROSSELET 1977 using the interfering amplitude method. 19  At high $\vert {{\mathit t}}\vert $. 20  At low $\vert {{\mathit t}}\vert $. 21  On sheet II in a 4-pole solution, the other poles are found on sheet$~$III at (953$−55\mathit i$) MeV and on sheet$~$IV at (938$−35\mathit i$) MeV. 22  Combined fit of ALDE 1995B, ANISOVICH 1994, 23  On sheet II in a 2 pole solution. The other pole is found on sheet$~$III at (996$-103\mathit i$) MeV. 24  From sheet II pole position. 25  On sheet II in a 2 pole solution. The other pole is found on sheet$~$III at (797$-185\mathit i$) MeV and can be interpreted as a shadow pole. 26  On sheet II in a 2 pole solution. The other pole is found on sheet$~$III at (978$-28\mathit i$) MeV. 27  From coupled channel analysis. 28  Coupled channel analysis with finite width corrections. 29  From coupled channel fit to the HYAMS 1973 and PROTOPOPESCU 1973 data. With a simultaneous fit to the ${{\mathit \pi}}{{\mathit \pi}}$ phase-shifts, inelasticity and to the ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ invariant mass. 30  Included in AGUILAR-BENITEZ 1978 fit.

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