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

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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

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