# ${{\boldsymbol f}_{{0}}{(980)}}$ WIDTH INSPIRE search

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
 2015 P
BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$3 ${{\mathit \pi}}$
$9.5$ $\pm1.1$ 706
 2012 E
BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}$3 ${{\mathit \pi}}$
$42$ ${}^{+20}_{-16}$ 1, 2
 2011
RVUE Compilation
$50$ ${}^{+20}_{-12}$ 2, 3
 2011
RVUE Compilation
$48$ ${}^{+22}_{-6}$ 4
 2011
RVUE Compilation
$36$ $\pm22$ 5
 2010
RVUE Compilation
$70$ ${}^{+20}_{-32}$ 6
 2009
RVUE 0.0 ${{\overline{\mathit p}}}{{\mathit p}}$ , ${{\mathit \pi}}{{\mathit N}}$
$91$ ${}^{+30}_{-22}$ $\pm3$ 44 7
 2009
CLEO 4.17 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit D}_{{s}}^{-}}{{\mathit D}_{{s}}^{*+}}$ + c.c.
$66.9$ $\pm2.2$ ${}^{+17.6}_{-12.5}$ 8
 2008 A
BELL 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
$65$ $\pm13$ $262$ $\pm30$ 9
 2007 AK
BABR 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$
$81$ $\pm21$ $54$ $\pm9$ 9
 2007 AK
BABR 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$
$51.3$ ${}^{+20.8}_{-17.7}$ ${}^{+13.2}_{-3.8}$ 10
 2007
BELL 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$61$ $\pm9$ ${}^{+14}_{-8}$ 2584 11
 2005
BELL ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$64$ $\pm16$ 12
 2003
RVUE
$121$ $\pm23$
 2003
SPEC 40.0 ${{\mathit \pi}^{-}}$ ${}^{}\mathrm {C}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$ X
$\sim{}\text{ 70}$ 13
 2002
RVUE $1.02$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$
$44$ $\pm2$ $\pm2$ 848 14
 2001 A
E791 ${{\mathit D}_{{s}}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{+}}$
$201$ $\pm28$ 419 15
 2000 H
SND ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$
$122$ $\pm13$ 419 16, 17
 2000 H
SND ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$
$56$ $\pm20$ 18
 1999 C
CMD2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$
$65$ $\pm20$
 1999
OMEG 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{s}}}{{\mathit p}_{{f}}}{{\mathit K}^{+}}{{\mathit K}^{-}}$
$80$ $\pm10$
 1999 B
OMEG 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{s}}}{{\mathit p}_{{f}}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$80$ $\pm10$
 1999 C
OMEG 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}_{{s}}}{{\mathit p}_{{f}}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
$48$ $\pm12$ $\pm8$ 19
 1999 D
OMEG 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$ , ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$65$ $\pm25$
 1999
GAM4 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
$71$ $\pm14$ 20
 1999
RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ , ${{\mathit K}}{{\overline{\mathit K}}}$ , ${{\mathit \sigma}}{{\mathit \sigma}}$
$\sim{}\text{ 28}$ 20
 1999
RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ , ${{\mathit K}}{{\overline{\mathit K}}}$
$\sim{}\text{ 25}$
 1999 B
RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ , ${{\mathit K}}{{\overline{\mathit K}}}$
$\sim{}\text{ 14}$ 20
 1999 C
RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ , ${{\mathit K}}{{\overline{\mathit K}}}$ , ${{\mathit \eta}}{{\mathit \eta}}$
$70$ $\pm20$
 1998
GAM4
$86$ $\pm16$ 20
 1998 B
RVUE Compilation
$54$ 21
 1998
RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ , ${{\mathit K}}{{\overline{\mathit K}}}$
$69$ $\pm15$ 22
 1997
GAM2 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
$38$ $\pm20$ 23
 1997 C
OBLX 0.0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
$\sim{}\text{ 100}$ 24
 1996
RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ , ${{\mathit K}}{{\overline{\mathit K}}}$
$34$
 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 25
 1995 B
GAM2 38 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit n}}$
$95$ $\pm20$ 10k 26
 1995 B
GAM2 38 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit n}}$
$26$ $\pm10$
 1995 B
CBAR $0.0$ ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ 3 ${{\mathit \pi}^{0}}$
$\sim{}\text{ 112}$ 27
 1995 D
CBAR 0.0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ , ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$ , ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \eta}}$
$80$ $\pm12$ 28
 1995
RVUE
$30$
 1995
RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ , ${{\mathit K}}{{\overline{\mathit K}}}$
$74$ 29
 1994
RVUE ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}$2 ${{\mathit \pi}^{0}}$
$29$ $\pm2$ 30
 1994
RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ , ${{\mathit K}}{{\overline{\mathit K}}}$
$46$ 31
 1994 B
RVUE
$48$ $\pm12$ 32
 1993
RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ ${{\mathit K}}$ ${{\overline{\mathit K}}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$( ${{\mathit K}}{{\overline{\mathit K}}}$), ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \pi}}{{\mathit \pi}}$( ${{\mathit K}}{{\overline{\mathit K}}}$), ${{\mathit D}_{{s}}}$ $\rightarrow$ ${{\mathit \pi}}$( ${{\mathit \pi}}{{\mathit \pi}}$)
$37.4$ $\pm10.6$ 22
 1991
EHS 400 ${{\mathit p}}{{\mathit p}}$
$72$ $\pm8$ 33
 1991
OMEG 300 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}{{\mathit \pi}}{{\mathit \pi}}$ , ${{\mathit p}}{{\mathit p}}{{\mathit K}}{{\overline{\mathit K}}}$
$110$ $\pm30$
 1990
SFM ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$29$ $\pm13$ 22
 1986 B
HRS ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ X
$120$ $\pm281$ $\pm20$
 1982 B
MPS 23 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}$2 ${{\mathit K}_S^0}$
$28$ $\pm10$ 33
 1981
MRK2 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ X
$70\text{ to }300$ 34
 1980
RVUE
$100$ $\pm80$ 35
 1978
HBC 0.7 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$
$30$ $\pm8$ 33
 1977
ASPK 2$-$2.4 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$ , ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit n}}$
$48$ $\pm14$ 33
 1973
CNTR ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}$ MM
$32$ $\pm10$ 36
 1973
ASPK 17 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$
$30$ $\pm10$ 36
 1973
ASPK 17 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$
$54$ $\pm16$ 36
 1973
HBC 7 ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit p}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
1  Analytic continuation using Roy equations. Uses 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 .
2  Quoted number refers to twice imaginary part of pole position.
3  Analytic continuation using GKPY equations. Uses 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 .
4  Pole position. Used Roy equations.
5  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.
6  On sheet II in a 2-pole solution. The other pole is found on sheet III at (850$−100\mathit i$) MeV
7  Using a relativistic Breit-Wigner function and taking into account the finite ${{\mathit D}_{{s}}}$ mass.
8  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.
9  Systematic errors not estimated.
10  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 .
11  Breit-Wigner, solution 1, PWA ambiguous.
12  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.
13  Using the data of AKHMETSHIN 1999C, ACHASOV 2000H, and ALOISIO 2002D.
14  Breit-Wigner width.
15  Supersedes ACHASOV 1998I. Using the model of ACHASOV 1989 .
16  Supersedes ACHASOV 1998I.
17  In the narrow resonance'' approximation.
18  From the combined fit of the photon spectra in the reactions ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$ , ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$ .
19  Supersedes BARBERIS 1999 and BARBERIS 1999B
20  T-matrix pole.
21  On sheet II in a 2 pole solution. The other pole is found on sheet$~$III at (1039$−93\mathit i$) MeV.
22  From invariant mass fit.
23  On sheet II in a 2 pole solution. The other pole is found on sheet III at (963-29i) MeV.
24  Reanalysis of data from HYAMS 1973 , GRAYER 1974 , SRINIVASAN 1975 , and ROSSELET 1977 using the interfering amplitude method.
25  At high $\vert {{\mathit t}}\vert$.
26  At low $\vert {{\mathit t}}\vert$.
27  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.
28  Combined fit of ALDE 1995B, ANISOVICH 1994 ,
29  On sheet II in a 2 pole solution. The other pole is found on sheet$~$III at (996$-103\mathit i$) MeV.
30  From sheet II pole position.
31  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.
32  On sheet II in a 2 pole solution. The other pole is found on sheet$~$III at (978$-28\mathit i$) MeV.
33  From coupled channel analysis.
34  Coupled channel analysis with finite width corrections.
35  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.
36  Included in AGUILAR-BENITEZ 1978 fit.

${{\mathit f}_{{0}}{(980)}}$ width (MeV)
References:
 ABLIKIM 2015P
PR D92 012007 Observation of the Isospin-Violating Decay ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \pi}^{0}}{{\mathit f}_{{0}}{(980)}}$
 ABLIKIM 2012E
PRL 108 182001 First Observation of ${{\mathit \eta}{(1405)}}$ Decays into ${{\mathit f}_{{0}}{(980)}}{{\mathit \pi}^{0}}$
 GARCIA-MARTIN 2011
PRL 107 072001 Precise Determination of the ${{\mathit f}_{{0}}{(600)}}$ and ${{\mathit f}_{{0}}{(980)}}$ Pole Parameters from a Dispersive Data Analysis
 MOUSSALLAM 2011
EPJ C71 1814 Couplings of Light $\mathit I = 0$ Scalar Mesons to Simple Operators in the Complex Plane
 MENNESSIER 2010
PL B688 59 The ${{\mathit \sigma}}$ and ${{\mathit f}_{{0}}{(980)}}$ from ${{\mathit K}_{{e4}}}$⊕${{\mathit \pi}}{{\mathit \pi}}$ Scatterings Data
 ANISOVICH 2009
IJMP A24 2481 The Combined Analysis of ${{\mathit \pi}}$ ${{\mathit N}}$ $\rightarrow$ two mesons ${+}$ ${{\mathit N}}$ Reactions within Reggeon Exchanges and Data for ${{\mathit p}}$ ${{\overline{\mathit p}}}$ (at rest) $\rightarrow$ three mesons
 ECKLUND 2009
PR D80 052009 Study of the Semileptonic Decay ${{\mathit D}_{{s}}^{+}}$ $\rightarrow$ ${{\mathit f}_{{0}}{(980)}}{{\mathit e}^{+}}{{\mathit \nu}}$ and Implications for ${{\mathit B}_{{s}}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit f}_{{0}}}$
 UEHARA 2008A
PR D78 052004 High-Statistics Measurement of Neutral-Pion Pair Production in Two-Photon Collisions
 AUBERT 2007AK
PR D76 012008 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ , ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ and ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}$ Cross Sections Measured with Initial-State Radiation
 MORI 2007
PR D75 051101 High Statistics Study of the Resonance in ${{\mathit \gamma}}$ ${{\mathit \gamma}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ Production
 GARMASH 2005
PR D71 092003 Dalitz Analysis of the Three-Body Charmless Decays ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ and ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{+}}{{\mathit K}^{-}}$
 ANISOVICH 2003
EPJ A16 229 K Matrix Analysis of the ($\mathit IJ{}^{PC}$ = 00${}^{++}$)-wave in the Mass Region below 1900 MeV
 TIKHOMIROV 2003
PAN 66 828 Resonances in the ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$ System Produced in Collisions of Negative Pions with a Carbon Target at a Momentum of 40 GeV
 BRAMON 2002
EPJ C26 253 Scalar ${{\mathit f}_{{0}}{(980)}}$ and ${{\mathit \sigma}{(500)}}$ Meson Exchange in ${{\mathit \phi}}$ Decays into ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$
 AITALA 2001A
PRL 86 765 Study of the ${{\mathit D}_{{s}}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{+}}$ Decay Measurement of ${{\mathit f}_{{0}}}$ Masses and Widths
 ACHASOV 2000H
PL B485 349 The ${{\mathit \phi}{(1020)}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$ Decay
 AKHMETSHIN 1999C
PL B462 380 Study of the ${{\mathit \phi}}$ Decays into ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$ and ${{\mathit \eta}}{{\mathit \pi}^{0}}{{\mathit \gamma}}$ Final States
 BARBERIS 1999
PL B453 305 A Partial Wave Analysis of the Centrally Produced ${{\mathit K}^{+}}{{\mathit K}^{-}}$ and ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ Systems in ${{\mathit p}}{{\mathit p}}$ Interactions at 450 ${\mathrm {GeV/}}\mathit c$ and New Information on the Spin of the ${{\mathit f}_{{J}}{(1710)}}$
 BARBERIS 1999B
PL B453 316 A Partial Wave Analysis of the Centrally Produced ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ System in ${{\mathit p}}{{\mathit p}}$ Interactions at 450 ${\mathrm {GeV/}}\mathit c$
 BARBERIS 1999C
PL B453 325 A Partial Wave Analysis of the Centrally Produced ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ System in ${{\mathit p}}{{\mathit p}}$ Interactions at 450 ${\mathrm {GeV/}}\mathit c$
 BARBERIS 1999D
PL B462 462 A Coupled Channel Analysis of the Centrally Produced ${{\mathit K}^{+}}{{\mathit K}^{-}}$ and ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ Final States in ${{\mathit p}}{{\mathit p}}$ Interactions at 450 ${\mathrm {GeV/}}\mathit c$
 BELLAZZINI 1999
PL B467 296 A Partial Wave Analysis of the Centrally Produced ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ System in ${{\mathit p}}{{\mathit p}}$ Interactions at 450 ${\mathrm {GeV/}}\mathit c$
 KAMINSKI 1999
EPJ C9 141 Scalar Mesons and Multichannel Amplitudes
 OLLER 1999B
NP A652 407 (erratum) Chiral Symmetry Amplitudes in the S-wave Isoscalar and Isovector Channels and the ${{\mathit \sigma}}$, ${{\mathit f}_{{0}}{(980)}}$, ${{\mathit a}_{{0}}{(980)}}$ Scalar Mesons
 OLLER 1999C
PR D60 074023 N/D Description of Two Meson Amplitudes and Chiral Symmetry
 OLLER 1999
PR D60 099906 (erratum) Meson-Meson Interaction in a Nonperturbative Chiral Approach
 ALDE 1998
EPJ A3 361 Study of the ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ System with the GAMS-4000 Spectrometer at 100 ${\mathrm {GeV/}}\mathit c$
 ANISOVICH 1998B
SPU 41 419 The Lightest Scalar Glueball
 LOCHER 1998
EPJ C4 317 Structure of ${{\mathit f}_{{0}}{(980)}}$ from a Coupled Channel Analysis of S-wave ${{\mathit \pi}}{{\mathit \pi}}$ Scattering
 ALDE 1997
PL B397 350 Study of the ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ System in ${{\mathit p}}{{\mathit p}}$ Central Collisions at 450 ${\mathrm {GeV/}}\mathit c$
 BERTIN 1997C
PL B408 476 Spin Parity Analysis of the Final State ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ from ${{\overline{\mathit p}}}{{\mathit p}}$ Annihilation at Rest in Hydrogen Targets at Three Densities
 ISHIDA 1996
PTP 95 745 An Analysis of ${{\mathit \pi}}{{\mathit \pi}}$ Scattering Phase Shift and Existence of ${{\mathit \sigma}{(555)}}$ Particle
 TORNQVIST 1996
PRL 76 1575 Resurrection of the ${{\mathit \sigma}}$ Meson
 ALDE 1995B
ZPHY C66 375 Study of the ${{\mathit f}_{{0}}{(995)}}$ Resonance in the ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ Decay Channel
 AMSLER 1995B
PL B342 433 High Statistical Study of ${{\mathit f}_{{0}}{(1500)}}$ Decay into ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
 AMSLER 1995D
PL B355 425 Coupled Channel Analysis of ${{\overline{\mathit p}}}{{\mathit p}}$ Annihilation into ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$, ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$ and ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \eta}}$
 ANISOVICH 1995
PL B355 363 Two Resonance Structure of the ($\mathit I(\mathit J{}^{PC}) = 0(0{}^{++})$) ${{\mathit \pi}}{{\mathit \pi}}$ Amplitude in Mass Region around 1 GeV
 JANSSEN 1995
PR D52 2690 On the Structure of the Scalar Mesons ${{\mathit f}_{{0}}{(975)}}$ and ${{\mathit a}_{{0}}{(980)}}$
 BUGG 1994
PR D50 4412 Coupled Channel Analysis of Data on ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ 3 ${{\mathit \pi}^{0}}$ , ${{\mathit \eta}}{{\mathit \eta}}{{\mathit \pi}^{0}}$, and ${{\mathit \eta}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ at Rest, with the N/D Method
 KAMINSKI 1994
PR D50 3145 Relativistic Effects in the Scalar Meson Dynamics
 ZOU 1994B
PR D50 591 Remarks on $\mathit I = 0$ $\mathit J{}^{PC} = 0{}^{++}$ States: $\sigma /\epsilon$ and ${{\mathit f}_{{0}}{(975)}}$
 MORGAN 1993
PR D48 1185 New Data on the ${{\mathit K}}{{\overline{\mathit K}}}$ Threshold Region and the Nature of the ${{\mathit f}_{{0}}{(S*)}}$
 AGUILAR-BENITEZ 1991
ZPHY C50 405 Inclusive Particle Production in 400 ${\mathrm {GeV/}}\mathit c$ ${{\mathit p}}{{\mathit p}}$ Interactions
 ARMSTRONG 1991
ZPHY C51 351 Study of the Centrally Produced ${{\mathit \pi}}{{\mathit \pi}}$ and ${{\mathit K}}{{\overline{\mathit K}}}$ Systems at 85 and 300 ${\mathrm {GeV/}}\mathit c$
 BREAKSTONE 1990
ZPHY C48 569 The Reaction pomeron pomeron $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ and an Unusual Production Mechanism for the ${{\mathit f}_{{2}}{(1270)}}$
 ABACHI 1986B
PRL 57 1990 Observation of Tensor and Scalar Mesons Produced in ${{\mathit e}^{+}}{{\mathit e}^{-}}$ Annihilation at 29 GeV
 ETKIN 1982B
PR D25 1786 Amplitude Analysis of the ${{\mathit K}_S^0}{{\mathit K}_S^0}$ System Produced in the Reaction ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit n}}$ at 23 ${\mathrm {GeV/}}\mathit c$
 GIDAL 1981
PL 107B 153 Observation of ${{\mathit S}^{*}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ in ${{\mathit \psi}}$ Decay
 ACHASOV 1980
SJNP 32 566 Nature of Scalar Resonances
 AGUILAR-BENITEZ 1978
NP B140 73 Study of a ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ Plus Threshold Enhancement Observed in the Final States ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ Pions at 700 to 760 ${\mathrm {MeV}}/\mathit c$
 LEEPER 1977
PR D16 2054 A Study of the Reactions ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$ and ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit n}}$ at 1.98 and 2.41 ${\mathrm {GeV/}}\mathit c$
 BINNIE 1973
PRL 31 1534 Direct Evidence for the ${{\mathit S}^{*}}$ Meson near the ${{\mathit K}}{{\overline{\mathit K}}}$ Threshold
 GRAYER 1973
Tallahassee Coupled Channel Analysis in the ${{\mathit K}}{{\overline{\mathit K}}}$ Threshold Region
 HYAMS 1973
NP B64 134 ${{\mathit \pi}}{{\mathit \pi}}$ Phase Shift Analysis from 600 to 1900 MeV
 PROTOPOPESCU 1973
PR D7 1279 ${{\mathit \pi}}{{\mathit \pi}}$ Partial Wave Analysis from Reactions ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \Delta}^{++}}$ and ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \Delta}^{++}}$ at 7.1 ${\mathrm {GeV/}}\mathit c$