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

INSPIRE   PDGID:
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
2015P
BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$3 ${{\mathit \pi}}$
$9.5$ $\pm1.1$ 706
ABLIKIM
2012E
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
2008A
BELL 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
$65$ $\pm13$ $262$ $\pm30$ 3
AUBERT
2007AK
BABR 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$
$81$ $\pm21$ $54$ $\pm9$ 3
AUBERT
2007AK
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
2001A
E791 ${{\mathit D}_{{{s}}}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{+}}$
$201$ $\pm28$ 419 9
ACHASOV
2000H
SND ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$
$122$ $\pm13$ 419 10, 11
ACHASOV
2000H
SND ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$
$56$ $\pm20$ 12
AKHMETSHIN
1999C
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
1999B
OMEG 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{{s}}}}{{\mathit p}_{{{f}}}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$80$ $\pm10$
BARBERIS
1999C
OMEG 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{{s}}}}{{\mathit p}_{{{f}}}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
$48$ $\pm12$ $\pm8$ 13
BARBERIS
1999D
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
1999B
RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$, ${{\mathit K}}{{\overline{\mathit K}}}$
$\sim{}\text{ 14}$ 14
OLLER
1999C
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
1998B
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
1997C
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
1995B
GAM2 38 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit n}}$
$95$ $\pm20$ 10k 20
ALDE
1995B
GAM2 38 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit n}}$
$26$ $\pm10$
AMSLER
1995B
CBAR $0.0$ ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ 3 ${{\mathit \pi}^{0}}$
$\sim{}\text{ 112}$ 21
AMSLER
1995D
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
1994B
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
1986B
HRS ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ X
$120$ $\pm281$ $\pm20$
ETKIN
1982B
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.
References