${{\boldsymbol f}_{{2}}{(1950)}}$ WIDTH INSPIRE search

VALUE (MeV) DOCUMENT ID TECN  COMMENT
$\bf{ 464 \pm24}$ OUR AVERAGE
$380$ ${}^{+120}_{-90}$
BAI
2000A
BES ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}$( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$)
$520$ $\pm50$ 1
BARBERIS
2000C
450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}$4 ${{\mathit \pi}}$
$485$ $\pm55$ 2
BARBERIS
2000C
450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}$4 ${{\mathit \pi}}$
$460$ $\pm40$
BARBERIS
1997B
OMEG 450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$)
$390$ $\pm60$
ANTINORI
1995
OMEG 300,450 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit p}}$2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$)
• • • We do not use the following data for averages, fits, limits, etc. • • •
$441$ ${}^{+27}_{-25}$ ${}^{+28}_{-192}$ 3
UEHARA
2009
BELL 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
$450$ $\pm50$ 4
BINON
2005
GAMS 33 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \eta}}{{\mathit n}}$
$297$ $\pm12$ $\pm6$
ABE
2004
BELL 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}$
$385$ $\pm58$ 5
AMSLER
2002
CBAR $0.9$ ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$ , ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
$495$ $\pm35$
ANISOVICH
2000J
SPEC
$500$ $\pm100$
ANISOVICH
1999B
SPEC $1.35 - 1.94$ ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \eta}}{{\mathit \pi}^{0}}$
$\sim$$100$ 6
OAKDEN
1994
RVUE $0.36 - 1.55$ ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$
$250$ $\pm50$ 7
ASTON
1991
LASS 11 ${{\mathit K}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}{{\mathit \pi}}$
1  Decaying into ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$2 ${{\mathit \pi}^{0}}$ .
2  Decaying into 2( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ ).
3  Taking into account ${{\mathit f}_{{4}}{(2050)}}$.
4  First solution, PWA is ambiguous.
5  T-matrix pole.
6  From solution B of amplitude analysis of data on ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ . See however KLOET 1996 who fit ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ only and find waves only up to $\mathit J = 3$ to be important but not significantly resonant.
7  Cannot determine spin to be 2.
  References:
UEHARA 2009
PR D79 052009 High-Statistics Study of Neutral-Pion Pair Production in Two-Photon Collisions
BINON 2005
PAN 68 960 Investigation of the ${{\mathit \eta}}{{\mathit \eta}}$ System in ${{\mathit \pi}^{-}}{{\mathit p}}$ Interactions at a Momentum of 32.5 GeV/$\mathit c$ at the GAMS-4$\pi $ Spectrometer
ABE 2004
EPJ C32 323 Measurement of ${{\mathit K}^{+}}{{\mathit K}^{-}}$ Production in Two Photon Collisions in the Resonant Mass Region
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 ${{\mathit \pi}^{0}}{{\mathit \eta}}{{\mathit \eta}}$
ANISOVICH 2000J
PL B491 47 I = 0 C = +1 Mesons from 1920 to 2410 MeV
BAI 2000A
PL B472 207 Partial Wave Analysis of ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}$( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$)
BARBERIS 2000C
PL B471 440 A Spin Analysis of the 4${{\mathit \pi}}$ Channels Produced in Central ${{\mathit p}}{{\mathit p}}$ Interactions at 450 ${\mathrm {GeV/}}\mathit c$
ANISOVICH 1999B
PL B449 154 Observation of ${{\mathit f}_{{0}}{(1770)}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \eta}}$ in ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \eta}}{{\mathit \pi}^{0}}$ Reactions from 600 to 1200 ${\mathrm {MeV}}/\mathit c$
BARBERIS 1997B
PL B413 217 A Study of the Centrally Produced ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ Channel in ${{\mathit p}}{{\mathit p}}$ Interactions at 450 ${\mathrm {GeV/}}\mathit c$
ANTINORI 1995
PL B353 589 A Further Study of the Centrally Produced ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ and ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ Channels in ${{\mathit p}}{{\mathit p}}$ Interactions at 300 and 450 ${\mathrm {GeV/}}\mathit c$
OAKDEN 1994
NP A574 731 Amplitude Analysis of Data on ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ at Low Energy
ASTON 1991
NPBPS B21 5 Strangeonium Production from LASS