pdgLive Home   >   LIGHT UNFLAVORED MESONS ($\mathit S$ = $\mathit C$ = $\mathit B$ = 0)   >   ${{\mathit \rho}{(770)}}$   >   NEUTRAL ONLY, OTHER REACTIONS

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

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

NEUTRAL ONLY, OTHER REACTIONS

INSPIRE   PDGID:

M009M0R

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT $\bf{ 769.0 \pm0.9}$ OUR AVERAGE  Error includes scale factor of 1.4.  See the ideogram below. $765$ $\pm6$ BERTIN 1997 C 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 2018 C BES3 ${{\mathit \eta}^{\,'}{(958)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $772.93$ $\pm0.18$ $\pm0.34$ 970k 8 ABLIKIM 2018 C 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 1999 E 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

Except where otherwise noted, content of the 2023 Review of Particle Physics is licensed under a Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license. The publication of the Review of Particle Physics is supported by US DOE, MEXT (Japan), INFN (Italy), JPS and CERN. Individual collaborators receive support for their PDG activities from their respective institutes or funding agencies. © 2023. See LBNL disclaimers.