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

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
$\bf{ 769.0 \pm0.9}$ OUR AVERAGE  Error includes scale factor of 1.4.
$765$ $\pm6$
BERTIN
1997C
OBLX 0.0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
$773$ $\pm1.6$
WEIDENAUER
1993
ASTE ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \omega}}$
$762.6$ $\pm2.6$
AGUILAR-BENIT..
1991
EHS 400 ${{\mathit p}}{{\mathit p}}$
$770$ $\pm2$ 1
HEYN
1981
RVUE Pion form factor
$768$ $\pm4$ 2, 3
BOHACIK
1980
RVUE
$769$ $\pm3$ 4
WICKLUND
1978
ASPK 3,4,6 ${{\mathit \pi}^{\pm}}{{\mathit N}}$
$768$ $\pm1$ 76k
DEUTSCHMANN
1976
HBC 16 ${{\mathit \pi}^{+}}{{\mathit p}}$
$767$ $\pm4$ 4100
ENGLER
1974
DBC 6 ${{\mathit \pi}^{+}}$ ${{\mathit n}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit p}}$
$775$ $\pm4$ 32k 2
PROTOPOPESCU
1973
HBC 7.1 ${{\mathit \pi}^{+}}{{\mathit p}}$ , $\mathit t$ $<$0.4
$764$ $\pm3$ 6.8k 5
RATCLIFF
1972
ASPK 15 ${{\mathit \pi}^{-}}{{\mathit p}}$ , $\mathit t$ $<$0.3
$774$ $\pm3$ 1.7k
REYNOLDS
1969
HBC 2.26 ${{\mathit \pi}^{-}}{{\mathit p}}$
$769.2$ $\pm1.5$ 13.3k 6
PISUT
1968
RVUE 1.7$-$3.2 ${{\mathit \pi}^{-}}{{\mathit p}}$ , $\mathit t$ $<$10
• • • We do not use the following data for averages, fits, limits, etc. • • •
$774.34$ $\pm0.18$ $\pm0.35$ 970k 7
ABLIKIM
2018C
BES3 ${{\mathit \eta}^{\,'}{(958)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$772.93$ $\pm0.18$ $\pm0.34$ 970k 8
ABLIKIM
2018C
BES3 ${{\mathit \eta}^{\,'}{(958)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$773.5$ $\pm2.5$ 9
COLANGELO
2001
RVUE ${{\mathit \pi}}$ ${{\mathit \pi}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$
$762.3$ $\pm0.5$ $\pm1.2$ 600k 10
ABELE
1999E
CBAR 0.0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
$777$ $\pm2$ 4.9k 11
ADAMS
1997
E665 470 ${{\mathit \mu}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \mu}}$
$770$ $\pm2$ 12
BOGOLYUBSKY
1997
MIRA 32 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ X
$768$ $\pm8$ 12
BOGOLYUBSKY
1997
MIRA 32 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ X
$761.1$ $\pm2.9$
DUBNICKA
1989
RVUE ${{\mathit \pi}}$ form factor
$777.4$ $\pm2.0$ 13
CHABAUD
1983
ASPK 17 ${{\mathit \pi}^{-}}{{\mathit p}}$ polarized
$769.5$ $\pm0.7$ 2, 3
LANG
1979
RVUE
$770$ $\pm9$ 3
ESTABROOKS
1974
RVUE 17 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$
$773.5$ $\pm1.7$ 11.2k 14
JACOBS
1972
HBC 2.8 ${{\mathit \pi}^{-}}{{\mathit p}}$
$775$ $\pm3$ 2.2k 15
HYAMS
1968
OSPK 11.2 ${{\mathit \pi}^{-}}{{\mathit p}}$
1  HEYN 1981 includes all spacelike and timelike $\mathit F_{{{\mathit \pi}}}$ values until 1978.
2  From pole extrapolation.
3  From phase shift analysis of GRAYER 1974 data.
4  Phase shift analysis. Systematic errors added corresponding to spread of different fits.
5  Published values contain misprints. Corrected by private communication RATCLIFF 1974 .
6  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 .
7  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.
8  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.
9  Breit-Wigner mass from a phase-shift analysis of HYAMS 1973 and PROTOPOPESCU 1973 data.
10  Using relativistic Breit-Wigner and taking into account ${{\mathit \rho}}-{{\mathit \omega}}$ interference.
11  Systematic errors not evaluated.
12  Systematic effects not studied.
13  From fit of 3-parameter relativistic Breit-Wigner to helicity-zero part of P-wave intensity. CHABAUD 1983 includes data of GRAYER 1974 .
14  Mass errors enlarged by us to $\Gamma /\sqrt {\mathit N }$; see the note with the ${{\mathit K}^{*}{(892)}}$ mass.
15  Of HYAMS 1968 six parametrizations, this is theoretically soundest. MR

           ${{\mathit \rho}{(770)}^{0}}$ mass (MeV)
  References:
ABLIKIM 2018C
PRL 120 242003 Precision Study of $\eta^\prime\rightarrow\gamma\pi^+\pi^-$ Decay Dynamics
COLANGELO 2001
NP B603 125 ${{\mathit \pi}}{{\mathit \pi}}$ Scattering
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
BOGOLYUBSKY 1997
PAN 60 46 Inclusive Production of the ${{\mathit \rho}{(770)}^{0}}$ and ${{\mathit f}_{{2}}{(1270)}}$ Resonances in ${{\mathit p}}{{\mathit p}}$ and ${{\overline{\mathit p}}}{{\mathit p}}$ Interactions at 32 ${\mathrm {GeV/}}\mathit c$
WEIDENAUER 1993
ZPHY C59 387 ${{\mathit N}}{{\overline{\mathit N}}}$ Annihilation at Rest into Five Pions
AGUILAR-BENITEZ 1991
ZPHY C50 405 Inclusive Particle Production in 400 ${\mathrm {GeV/}}\mathit c$ ${{\mathit p}}{{\mathit p}}$ Interactions
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 ${\mathrm {GeV/}}\mathit c$
JACOBS 1972
PR D6 1291 Parametrization of the Nonevasive Exchange Processes and Background Contributions in the Reaction ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ at 2.77 ${\mathrm {GeV/}}\mathit c$
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