pdgLive Home   >   LIGHT UNFLAVORED MESONS ($\mathit S$ = $\mathit C$ = $\mathit B$ = 0)   >   ${{\mathit \rho}_{{{3}}}{(1690)}}$   >   2 ${{\mathit \pi}}$ MODE

${{\mathit \rho}_{{{3}}}{(1690)}}$ MASS

2 ${{\mathit \pi}}$ MODE

INSPIRE   JSON  (beta) PDGID:

M015M1

VALUE (MeV) EVTS DOCUMENT ID TECN CHG  COMMENT $\bf{ 1686 \pm4}$ OUR AVERAGE $1677$ $\pm14$ EVANGELISTA 1981 OMEG - 12 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ 2 ${{\mathit \pi}}{{\mathit p}}$ $1679$ $\pm11$ 476 BALTAY 1978 B HBC 0 15 ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$ $1678$ $\pm12$ 175 1 ANTIPOV 1977 CIBS 0 25 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}$3 ${{\mathit \pi}}$ $1690$ $\pm7$ 600 1 ENGLER 1974 DBC 0 6 ${{\mathit \pi}^{+}}$ ${{\mathit n}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit p}}$ $1693$ $\pm8$ 2 GRAYER 1974 ASPK 0 17 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$ $1678$ $\pm12$ MATTHEWS 1971 C DBC 0 7 ${{\mathit \pi}^{+}}{{\mathit N}}$ • • We do not use the following data for averages, fits, limits, etc. • • $1734$ $\pm10$ , 3 CORDEN 1979 OMEG 12$-$15 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}$2 ${{\mathit \pi}}$ $1692$ $\pm12$ 2, 4 ESTABROOKS 1975 RVUE 17 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$ $1737$ $\pm23$ ARMENISE 1970 DBC 0 9 ${{\mathit \pi}^{+}}{{\mathit N}}$ $1650$ $\pm35$ 122 BARTSCH 1970 B HBC + 8 ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit N}}$2 ${{\mathit \pi}}$ $1687$ $\pm21$ STUNTEBECK 1970 HDBC 0 8 ${{\mathit \pi}^{-}}{{\mathit p}}$, 5.4 ${{\mathit \pi}^{+}}{{\mathit d}}$ $1683$ $\pm13$ ARMENISE 1968 DBC 0 5.1 ${{\mathit \pi}^{+}}{{\mathit d}}$ $1670$ $\pm30$ GOLDBERG 1965 HBC 0 6 ${{\mathit \pi}^{+}}{{\mathit d}}$, 8 ${{\mathit \pi}^{-}}{{\mathit p}}$ 1  Mass errors enlarged by us to $\Gamma /\sqrt {\mathit N }$; see the note with the ${{\mathit K}^{*}{(892)}}$ mass. 2  Uses same data as HYAMS 1975. 3  From a phase shift solution containing a ${{\mathit f}_{{{2}}}^{\,'}{(1525)}}$ width two times larger than the ${{\mathit K}}{{\overline{\mathit K}}}$ result. 4  From phase-shift analysis. Error takes account of spread of different phase-shift solutions.

References

Except where otherwise noted, content of the 2025 Review of Particle Physics is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license. The publication of the Review of Particle Physics is supported by US DOE, MEXT (Japan), INFN (Italy) and CERN. Individual collaborators receive support for their PDG activities from their respective institutes or funding agencies. © 2025. See LBNL disclaimers.