pdgLive Home   >   LIGHT UNFLAVORED MESONS ($\mathit S$ = $\mathit C$ = $\mathit B$ = 0)   >   ${{\mathit \rho}{(1700)}}$   >   ${{\mathit \pi}}{{\mathit \pi}}$ MODE

${{\mathit \rho}{(1700)}}$ WIDTH

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

INSPIRE   JSON  (beta) PDGID:

M065W1

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT • • We do not use the following data for averages, fits, limits, etc. • • $249.39$ $\pm52.24$ 34M 1 IGNATOV 02   CMD3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $268.98$ $\pm11.40$ 2 BARTOS 01   RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $489.58$ $\pm16.95$ 3 BARTOS 01 A   RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $414.71$ $\pm119.48$ 4 BARTOS 01 A   RVUE ${{\mathit \tau}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit \nu}_{{{\tau}}}}$ $109$ $\pm19$ 20k 5 LEES 01 C   BABR ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ $310$ $\pm30$ ${}^{+25}_{-35}$ 63.5k 6 ABRAMOWICZ 01   ZEUS ${{\mathit e}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit e}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit p}}$ $316$ $\pm26$ 7 LEES 01 G   BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$ $164$ $\pm21$ ${}^{+89}_{-26}$ 5.4M 8, 9 FUJIKAWA 00   BELL ${{\mathit \tau}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit \nu}_{{{\tau}}}}$ $275$ $\pm45$ 10 ABELE 99   CBAR ${{\overline{\mathit p}}}$ ${{\mathit n}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ $310$ $\pm40$ 10 BERTIN 99 C   OBLX 0.0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ $400$ $\pm100$ CLEGG 99   RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $224$ $\pm22$ BISELLO 98   DM2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $242.5$ $\pm163.0$ DUBNICKA 98   RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $620$ $\pm60$ GESHKENBEIN 98   RVUE $<315$ 11 ERKAL 98   RVUE 20$-$70 ${{\mathit \gamma}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}}$ $280$ ${}^{+30}_{-80}$ ABE 98 B   HYBR 20 ${{\mathit \gamma}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit p}}$ $230$ $\pm80$ 12 ASTON 98   OMEG 20$-$70 ${{\mathit \gamma}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}$2 ${{\mathit \pi}}$ $283$ $\pm14$ 13 ATIYA 97 B   SPEC 50 ${{\mathit \gamma}}$ ${}^{}\mathrm {C}$ $\rightarrow$ ${}^{}\mathrm {C}$ 2 ${{\mathit \pi}}$ $175$ ${}^{+98}_{-53}$ BECKER 97   ASPK 17 ${{\mathit \pi}^{-}}{{\mathit p}}$ polarized $232$ $\pm34$ 11 LANG 97   RVUE $340$ 11 MARTIN 97 C   RVUE 17 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$ $300$ $\pm100$ 11 FROGGATT 97   RVUE 17 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$ $180$ $\pm50$ 14 HYAMS 97   ASPK 17 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$ 1  From a fit of the pion form factor using the GOUNARIS 1968 parametrization with the complex phase of the ${{\mathit \rho}}−{{\mathit \omega}}$ interference leaving ${{\mathit \rho}{(1450)}}$, ${{\mathit \rho}{(1700)}}$ resonances as free parameters of the fit. The fit uses also data from CMD-2 and DM2 experiments. Systematic errors not estimated. 2  Applies the Unitary $\&$ Analytic Model of the pion electromagnetic form factor of DUBNICKA 2010 to analyze the data of LEES 2012G and ABLIKIM 2016C. 3  Applies the Unitary $\&$ Analytic Model of the pion electromagnetic form factor of DUBNICKA 2010 to analyze the data of ACHASOV 2006, AKHMETSHIN 2007, AUBERT 2009AS, and AMBROSINO 2011A. 4  Applies the Unitary $\&$ Analytic Model of the pion electromagnetic form factor of DUBNICKA 2010 to analyze the data of FUJIKAWA 2008. 5  From a Dalitz plot analysis in an isobar model with ${{\mathit \rho}{(1450)}}$ and ${{\mathit \rho}{(1700)}}$ masses and widths floating. 6  Using the KUHN 1990 parametrization of the pion form factor, neglecting ${{\mathit \rho}}−{{\mathit \omega}}$ interference. 7  Using the GOUNARIS 1968 parametrization of the pion form factor leaving the masses and widths of the ${{\mathit \rho}{(1450)}}$, ${{\mathit \rho}{(1700)}}$, and ${{\mathit \rho}{(2150)}}$ resonances as free parameters of the fit. 8  $\vert \mathit F_{{{\mathit \pi}}}(0)\vert ^2$ fixed to 1. 9  From the GOUNARIS 1968 parametrization of the pion form factor. 10  T-matrix pole. 11  From phase shift analysis of HYAMS 1973 data. 12  Simple relativistic Breit-Wigner fit with constant width. 13  An additional 40 MeV uncertainty in both the mass and width is present due to the choice of the background shape. 14  Included in BECKER 1979 analysis.

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 and KEK (Japan), INFN (Italy) and CERN. Individual collaborators receive support for their PDG activities from their respective institutes or funding agencies. © 2025. See LBNL disclaimers.