${{\mathit f}_{{4}}{(2050)}}$ WIDTH

INSPIRE   PDGID:
M016W
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 237 \pm18}$ OUR AVERAGE  Error includes scale factor of 1.9.  See the ideogram below.
$290$ $\pm20$
AMELIN
2006
VES 36 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit \omega}}{{\mathit n}}$
$340$ $\pm80$ 1
BINON
2005
GAMS 33 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \eta}}{{\mathit n}}$
$395$ $\pm40$
ALDE
1998
GAM4 100 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit n}}$
$170$ $\pm60$
ALDE
1990
GAM2 38 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit \omega}}{{\mathit n}}$
$304$ $\pm60$
AUGUSTIN
1987
DM2 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$210$ $\pm63$
BALTRUSAITIS
1987
MRK3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$400$ $\pm100$
ALDE
1986D
 GAM4 100 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}$2 ${{\mathit \eta}}$
$240$ $\pm40$ 40k 2
BINON
1984B
 GAM2 38 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}$2 ${{\mathit \pi}^{0}}$
$190$ $\pm14$
DENNEY
1983
LASS 10 ${{\mathit \pi}^{+}}{{\mathit n}}$ $/$ ${{\mathit \pi}^{+}}{{\mathit p}}$
$186$ ${}^{+103}_{-58}$ 3
CASON
1982
STRC 8 ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \Delta}^{++}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
$305$ ${}^{+36}_{-119}$
ETKIN
1982B
 MPS 23 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}$2 ${{\mathit K}_S^0}$
$180$ $\pm60$ 700
APEL
1975
NICE 40 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}$2 ${{\mathit \pi}^{0}}$
$225$ ${}^{+120}_{-70}$
BLUM
1975
ASPK 18.4 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}{{\mathit K}^{+}}{{\mathit K}^{-}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$260$ $\pm40$ 4
ANISOVICH
2009
RVUE 0.0 ${{\overline{\mathit p}}}{{\mathit p}}$ , ${{\mathit \pi}}{{\mathit N}}$
$453$ $\pm20$ ${}^{+31}_{-129}$ 5
UEHARA
2009
BELL 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
$182$ $\pm7$
ANISOVICH
2000J
 SPEC 2.0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ , ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ , ${{\mathit \eta}}{{\mathit \eta}}$ , ${{\mathit \eta}}{{\mathit \eta}^{\,'}}$ , ${{\mathit \pi}}{{\mathit \pi}}$
$\sim$$170$ 6
MARTIN
1998
RVUE ${{\mathit N}}$ ${{\overline{\mathit N}}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$
$\sim$$200$ 7
MARTIN
1997
RVUE ${{\overline{\mathit N}}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$
$\sim$$60$ 8
OAKDEN
1994
RVUE $0.36 - 1.55$ ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$
$\sim$$80$ 9
OAKDEN
1994
RVUE $0.36 - 1.55$ ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$
$243$ $\pm16$ 10
ALPER
1980
CNTR 62 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit n}}$
$140$ $\pm15$ 10
ROZANSKA
1980
SPRK 18 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\overline{\mathit p}}}{{\mathit n}}$
$263$ $\pm57$ 10
CORDEN
1979
OMEG 12$-$15 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}$2 ${{\mathit \pi}}$
$100$ $\pm28$
EVANGELISTA
1979B
 OMEG 10 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit n}}$
$107$ $\pm56$ 11
ANTIPOV
1977
CIBS 25 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}$3 ${{\mathit \pi}}$
1  From the first PWA solution.
2  From a partial-wave analysis of the data.
3  From an amplitude analysis of the reaction ${{\mathit \pi}^{+}}$ ${{\mathit \pi}^{-}}$ $\rightarrow$ 2 ${{\mathit \pi}^{0}}$ .
4  K matrix pole.
5  Taking into account the ${{\mathit f}_{{2}}{(1950)}}$. Helicity-2 production favored.
6  Energy-dependent analysis.
7  Single energy analysis.
8  From solution A 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.
9  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.
10  $\mathit I(\mathit J{}^{P}) = 0(4{}^{+})$ from amplitude analysis assuming one-pion exchange.
11  Width errors enlarged by us to 4${}\Gamma /\sqrt {\mathit N }$; see the note with the ${{\mathit K}^{*}{(892)}}$ mass.

           ${{\mathit f}_{{4}}{(2050)}}$ width (MeV)
References:
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
UEHARA 2009
PR D79 052009 High-Statistics Study of Neutral-Pion Pair Production in Two-Photon Collisions
AMELIN 2006
PAN 69 690 Resonances in the ${{\mathit \omega}}{{\mathit \omega}}$ System
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
ANISOVICH 2000J
PL B491 47 I = 0 C = +1 Mesons from 1920 to 2410 MeV
ALDE 1998
EPJ A3 361 Study of the ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ System with the GAMS-4000 Spectrometer at 100 ${\mathrm {GeV/}}\mathit c$
Also
PAN 62 405 Investigation of the ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ System at a Primary Momentum of 100 ${\mathrm {GeV/}}\mathit c$ by using the GAMS-4000 Spectrometer
MARTIN 1998
PR C57 3492 Amplitudes and Resonances from an Energy Dependent Analysis of ${{\overline{\mathit p}}}$ ${+}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}}{+}$ ${{\mathit \pi}}$
MARTIN 1997
PR C56 1114 Partial Wave Amplitudes and Resonances in ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$
OAKDEN 1994
NP A574 731 Amplitude Analysis of Data on ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ at Low Energy
ALDE 1990
PL B241 600 Further Study of Mesons which Decay into ${{\mathit \omega}}{{\mathit \omega}}$
AUGUSTIN 1987
ZPHY C36 369 Radiative Decay of ${{\mathit J / \psi}}$ into ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
BALTRUSAITIS 1987
PR D35 2077 Radiative Decays of the ${{\mathit J / \psi}}$ into ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ and ${{\mathit \gamma}}{{\mathit K}^{+}}{{\mathit K}^{-}}$
ALDE 1986D
NP B269 485 Production of ${{\mathit G}{(1590)}}$ and other Mesons Decaying into ${{\mathit \eta}}$ Pairs by 100 ${\mathrm {GeV/}}\mathit c$ ${{\mathit \pi}^{-}}$ on Protons
BINON 1984B
LNC 39 41 Observation a Spin 6 Neutral ${{\mathit R}{(2510)}}$ Meson
DENNEY 1983
PR D28 2726 Study of ${{\mathit K}^{+}}{{\mathit K}^{-}}$ Production in ${{\mathit \pi}^{+}}{{\mathit d}}$ Interactions at 10 ${\mathrm {GeV/}}\mathit c$ and Evidence for a $\mathit J{}^{P} = 7{}^{-}$ Resonance M(2750) Decaying into ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$
CASON 1982
PRL 48 1316 Amplitude Analysis of the Reaction ${{\mathit \pi}^{+}}$ ${{\mathit \pi}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ from 1.0 to 2.3 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 ${\mathrm {GeV/}}\mathit c$
ALPER 1980
PL 94B 422 Evidence for a Spin-5 Boson Resonance at 2300 MeV
ROZANSKA 1980
NP B162 505 A Partial Wave Analysis of the ${{\mathit p}}{{\overline{\mathit p}}}$ System Produced at Low Four Momentum Transfer in the Reaction ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\overline{\mathit p}}}{{\mathit n}}$ at 18 GeV
CORDEN 1979
NP B157 250 An Amplitude Analysis of ${{\mathit \pi}}{{\mathit \pi}}$ Scattering from New Data on the Reaction ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$
EVANGELISTA 1979B
NP B154 381 Observation in the ${{\mathit K}^{+}}{{\mathit K}^{-}}$ System of a New Structure at 2.20 GeV
ANTIPOV 1977
NP B119 45 Boson States in the Reaction ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{-}}{{\mathit \pi}^{+}}{{\mathit p}}$ with Leading ${{\mathit \pi}^{+}}$ Meson at 25 ${\mathrm {GeV/}}\mathit c$
APEL 1975
PL 57B 398 Observation of a Spin 4 Neutral Meson with 2 GeV Mass Decaying in ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
BLUM 1975
PL 57B 403 Evidence for a Spin-4 Boson Resonance at 2050 MeV