${{\boldsymbol \rho}{(770)}}$ WIDTH

We no longer list ${\mathit S}{\mathrm -wave}$ Breit-Wigner fits, or data with high combinatorial background.

NEUTRAL ONLY, OTHER REACTIONS INSPIRE search

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 150.9 \pm1.7}$ OUR AVERAGE  Error includes scale factor of 1.1.
$122$ $\pm20$
BERTIN
1997C
OBLX 0.0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
$145.7$ $\pm5.3$
WEIDENAUER
1993
ASTE ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \omega}}$
$144.9$ $\pm3.7$
DUBNICKA
1989
RVUE ${{\mathit \pi}}$ form factor
$148$ $\pm6$ 1, 2
BOHACIK
1980
RVUE
$152$ $\pm9$ 3
WICKLUND
1978
ASPK 3,4,6 ${{\mathit \pi}^{\pm}}{{\mathit p}}{{\mathit N}}$
$154$ $\pm2$ 76k
DEUTSCHMANN
1976
HBC 16 ${{\mathit \pi}^{+}}{{\mathit p}}$
$157$ $\pm8$ 6.8k 4
RATCLIFF
1972
ASPK 15 ${{\mathit \pi}^{-}}{{\mathit p}}$ , $\mathit t$ $<$0.3
$143$ $\pm8$ 1.7k
REYNOLDS
1969
HBC 2.26 ${{\mathit \pi}^{-}}{{\mathit p}}$
• • • We do not use the following data for averages, fits, limits, etc. • • •
$150.85$ $\pm0.55$ $\pm0.67$ 970k 5
ABLIKIM
2018C
BES3 ${{\mathit \eta}^{\,'}{(958)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$150.18$ $\pm0.55$ $\pm0.65$ 970k 6
ABLIKIM
2018C
BES3 ${{\mathit \eta}^{\,'}{(958)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$147.0$ $\pm2.5$ 600k 7
ABELE
1999E
CBAR 0.0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
$146$ $\pm3$ 4.9k 8
ADAMS
1997
E665 470 ${{\mathit \mu}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \mu}}$
$160.0$ ${}^{+4.1}_{-4.0}$ 9
CHABAUD
1983
ASPK 17 ${{\mathit \pi}^{-}}{{\mathit p}}$ polarized
$155$ $\pm1$ 10
HEYN
1981
RVUE ${{\mathit \pi}}$ form factor
$148.0$ $\pm1.3$ 1, 2
LANG
1979
RVUE
$146$ $\pm14$ 4.1k
ENGLER
1974
DBC 6 ${{\mathit \pi}^{+}}$ ${{\mathit n}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit p}}$
$143$ $\pm13$ 2
ESTABROOKS
1974
RVUE 17 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$
$160$ $\pm10$ 32k 1
PROTOPOPESCU
1973
HBC 7.1 ${{\mathit \pi}^{+}}{{\mathit p}}$ , $\mathit t$ $<$0.4
$145$ $\pm12$ 2.2k 11, 3
HYAMS
1968
OSPK 11.2 ${{\mathit \pi}^{-}}{{\mathit p}}$
$163$ $\pm15$ 13.3k 12
PISUT
1968
RVUE 1.7$-$3.2 ${{\mathit \pi}^{-}}{{\mathit p}}$ , $\mathit t$ $<$10
1  From pole extrapolation.
2  From phase shift analysis of GRAYER 1974 data.
3  Width errors enlarged by us to 4${}\Gamma /\sqrt {\mathit N }$; see the note with the ${{\mathit K}^{*}{(892)}}$ mass.
4  Published values contain misprints. Corrected by private communication RATCLIFF 1974 .
5  From a fit to ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ mass using ${{\mathit \rho}{(770)}}$ (parametrized with the Gounaris-Sakurai approach), ${{\mathit \omega}{(782)}}$, and box anomaly components.
6  From a fit to ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ mass using ${{\mathit \rho}{(770)}}$ (parametrized with the Gounaris-Sakurai approach), ${{\mathit \omega}{(782)}}$, and ${{\mathit \rho}{(1450)}}$ components.
7  Using relativistic Breit-Wigner and taking into account ${{\mathit \rho}}-{{\mathit \omega}}$ interference.
8  Systematic errors not evaluated.
9  From fit of 3-parameter relativistic Breit-Wigner to helicity-zero part of ${\mathit P}{\mathrm -wave}$ intensity. CHABAUD 1983 includes data of GRAYER 1974 .
10  HEYN 1981 includes all spacelike and timelike $\mathit F_{{{\mathit \pi}}}$ values until 1978.
11  Of HYAMS 1968 six parametrizations this is theoretically soundest. MR
12  Includes MALAMUD 1969 , ARMENISE 1968 , BACON 1967 , HUWE 1967 , MILLER 1967B, ALFF-STEINBERGER 1966 , HAGOPIAN 1966 , HAGOPIAN 1966B, JACOBS 1966B, JAMES 1966 , WEST 1966 , GOLDHABER 1964 , ABOLINS 1963 .
  References:
ABLIKIM 2018C
PRL 120 242003 Precision Study of $\eta^\prime\rightarrow\gamma\pi^+\pi^-$ Decay Dynamics
ABELE 1999E
PL B469 270 The ${{\mathit \rho}}$ Mass, Width and Line Shape in ${{\overline{\mathit p}}}{{\mathit p}}$ Annihilation into ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
ADAMS 1997
ZPHY C74 237 Diffractive Production of ${{\mathit \rho}{(770)}^{0}}$ Mesons in Muon Proton Interactions at 470 GeV
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
WEIDENAUER 1993
ZPHY C59 387 ${{\mathit N}}{{\overline{\mathit N}}}$ Annihilation at Rest into Five Pions
DUBNICKA 1989
JP G15 1349 There is no Discrepancy between Different Pion Formfactor Data Sets
CHABAUD 1983
NP B223 1 Experimental Indications for a $2+{}^{+}{}^{}$ non (${\mathit {\mathit q}}{\mathit {\overline{\mathit q}}}$) Object
HEYN 1981
ZPHY C7 169 Analysis of the Pion Formfactor in the Spacelike and Timelike Region
BOHACIK 1980
PR D21 1342 Parameters of the Dominant Pion Pion Resonances
LANG 1979
PR D19 956 Determination of Resonance Parameters
WICKLUND 1978
PR D17 1197 Comparative Study of ${{\mathit \rho}^{0}}$, ${{\mathit \omega}}$, ${{\mathit K}^{*}{(890)}^{0}}$ and ${{\overline{\mathit K}}^{*}{(890)}^{0}}$ Production by Charge Exchange Reactions
DEUTSCHMANN 1976
NP B103 426 ${{\mathit \rho}^{0}}$ and ${{\mathit f}}$ Production in ${{\mathit \pi}^{+}}{{\mathit p}}$ Interactions
ENGLER 1974
PR D10 2070 ${{\mathit \pi}}{{\mathit \pi}}$ Scattering in the Energy Region 0.6 to 1.42 GeV
ESTABROOKS 1974
NP B79 301 ${{\mathit \pi}}{{\mathit \pi}}$ Phase Shift Analysis below the ${{\mathit K}}{{\overline{\mathit K}}}$ Threshold
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 ${\mathrm {GeV/}}\mathit c$
RATCLIFF 1972
PL 38B 345 Measurements of ${{\mathit \rho}}{{\mathit \omega}}$ Interference in the Reaction ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$ at 15 ${\mathrm {GeV/}}\mathit c$
REYNOLDS 1969
PR 184 1424 Single Pion Production in ${{\mathit \pi}^{-}}{{\mathit p}}$ Interactions at 2.26 ${\mathrm {GeV/}}\mathit c$
HYAMS 1968
NP B7 1 The Reaction ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \rho}^{0}}{{\mathit n}}$ and ${{\mathit K}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\overline{\mathit K}}^{*}{(890)}^{0}}{{\mathit n}}$ at 11.2 ${\mathrm {GeV/}}\mathit c$
PISUT 1968
NP B6 325 ${{\mathit \rho}}$ Meson Shape