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${\mathit m}_{{{\mathit \rho}{(770)}^{0}}}–{\mathit m}_{{{\mathit \rho}{(770)}^{\pm}}}$

INSPIRE   PDGID:

M009D

VALUE (MeV) EVTS DOCUMENT ID TECN CHG  COMMENT $\bf{ -0.7 \pm0.8}$ OUR AVERAGE  Error includes scale factor of 1.5.  See the ideogram below. $-2.4$ $\pm0.8$ 1 SCHAEL 2005 C ALEP ${{\mathit \tau}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit \nu}_{{\tau}}}$ $0.4$ $\pm0.7$ $\pm0.6$ 1.98M 2 ALOISIO 2003 KLOE 1.02 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ $1.3$ $\pm1.1$ $\pm2.0$ 500k 2 ACHASOV 2002 SND 1.02 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ $1.6$ $\pm0.6$ $\pm1.7$ 600k ABELE 1999 E CBAR $\pm{}$0 0.0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ $-4$ $\pm4$ 3000 3 REYNOLDS 1969 HBC -0 2.26 ${{\mathit \pi}^{-}}{{\mathit p}}$ $-5$ $\pm5$ 3600 3 FOSTER 1968 HBC $\pm{}$0 0.0 ${{\overline{\mathit p}}}{{\mathit p}}$ $2.4$ $\pm2.1$ 22950 4 PISUT 1968 RVUE ${{\mathit \pi}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit \rho}}{{\mathit N}}$ • • We do not use the following data for averages, fits, limits, etc. • • $-3.37$ $\pm1.06$ 5 BARTOS 2017 A RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ , ${{\mathit \tau}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit \nu}_{{\tau}}}$ 1  From the combined fit of the ${{\mathit \tau}^{-}}$ data from ANDERSON 2000A and SCHAEL 2005C and ${{\mathit e}^{+}}{{\mathit e}^{-}}$ data from the compilation of BARKOV 1985 , AKHMETSHIN 2004 , and ALOISIO 2005 . Supersedes BARATE 1997M. 2  Assuming ${\mathit m}_{{{\mathit \rho}^{+}}}$ = ${\mathit m}_{{{\mathit \rho}^{-}}}$, $\Gamma _{{{\mathit \rho}^{+}}}$ = $\Gamma _{{{\mathit \rho}^{-}}}$. 3  From quoted masses of charged and neutral modes. 4  Includes MALAMUD 1969 , ARMENISE 1968 , BATON 1968 , BACON 1967 , HUWE 1967 , MILLER 1967B, ALFF-STEINBERGER 1966 , HAGOPIAN 1966 , HAGOPIAN 1966B, JACOBS 1966B, JAMES 1966 , WEST 1966 , BLIEDEN 1965 , CARMONY 1964 , GOLDHABER 1964 , ABOLINS 1963 . 5  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, AMBROSINO 2011A, and FUJIKAWA 2008 .

${\mathit m}_{{{\mathit \rho}{(770)}^{0}}}–{\mathit m}_{{{\mathit \rho}{(770)}^{\pm}}}$ (MeV)

References:

BARTOS 2017A IJMP A32 1750154 The Mass and Width Differences of the Neutral and Charged ${{\mathit \rho}{(770)}}$, ${{\mathit \rho}{(1450 )}}$ and ${{\mathit \rho}{(1700)}}$ Mesons from ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ and ${{\mathit \nu}}{{\mathit \tau}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ Processes SCHAEL 2005C PRPL 421 191 Branching Ratios and Spectral Functions of ${{\mathit \tau}}$ Decays: Final ALEPH Measurements and Physics Implications ALOISIO 2003 PL B561 55 Study of the Decay ${{\mathit \phi}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ with the Detector ACHASOV 2002 PR D65 032002 Study of the ${{\mathit \pi}}{{\mathit \pi}}$ Mass Spectra in the Process ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ at $\sqrt {s }$ = 1020 MeV ABELE 1999E PL B469 270 The ${{\mathit \rho}}$ Mass, Width and Line Shape in ${{\overline{\mathit p}}}{{\mathit p}}$ Annihilation into ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ REYNOLDS 1969 PR 184 1424 Single Pion Production in ${{\mathit \pi}^{-}}{{\mathit p}}$ Interactions at 2.26 ${\mathrm {GeV/}}\mathit c$ FOSTER 1968 NP B6 107 Production of Three Pions in ${{\overline{\mathit p}}}{{\mathit p}}$ Annihilations at Rest PISUT 1968 NP B6 325 ${{\mathit \rho}}$ Meson Shape