# ${{\boldsymbol \rho}{(770)}}$ WIDTH

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

# CHARGED ONLY, HADROPRODUCED INSPIRE search

VALUE (MeV) EVTS DOCUMENT ID TECN CHG  COMMENT
$\bf{ 150.2 \pm2.4}$ OUR FIT
$\bf{ 150.2 \pm2.4}$ OUR AVERAGE
$152.8$ $\pm4.3$
 1997
CBAR ${{\overline{\mathit p}}}$ ${{\mathit n}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
$155$ $\pm11$ 2.9k 1
 1987
SPEC - 200 ${{\mathit \pi}^{-}}$ ${}^{}\mathrm {Cu}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{}^{}\mathrm {Cu}$
$154$ $\pm20$ 967 1
 1987
SPEC - 200 ${{\mathit \pi}^{-}}$ ${}^{}\mathrm {Pb}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{}^{}\mathrm {Pb}$
$150$ $\pm5$
 1986
SPEC + 202 ${{\mathit \pi}^{+}}$ ${}^{}\mathrm {A}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{0}}{}^{}\mathrm {A}$
$146$ $\pm12$ 6.5k 2
 1973
OSPK - 5 ${{\mathit \pi}^{-}}{{\mathit p}}$
$148.2$ $\pm4.1$ 9.6k 3
 1968
RVUE - 1.7$-$3.2 ${{\mathit \pi}^{-}}{{\mathit p}}$ , $\mathit t$ $<$10
$146$ $\pm13$ 900
 1967
HBC - 4.2 ${{\mathit \pi}^{-}}{{\mathit p}}$ , $\mathit t$ $<$10
• • • We do not use the following data for averages, fits, limits, etc. • • •
$137.0$ $\pm0.4$ 4
 2017
BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}$3 ${{\mathit \pi}}$
1  Width errors enlarged by us to 4${}\Gamma /\sqrt {\mathit N }$; see the note with the ${{\mathit K}^{*}{(892)}}$ mass.
2  Phase shift analysis. Systematic errors added corresponding to spread of different fits.
3  From fit of 3-parameter relativistic ${\mathit P}{\mathrm -wave}$ Breit-Wigner to total mass distribution. Includes BATON 1968 , MILLER 1967B, ALFF-STEINBERGER 1966 , HAGOPIAN 1966 , HAGOPIAN 1966B, JACOBS 1966B, JAMES 1966 , WEST 1966 , BLIEDEN 1965 and CARMONY 1964 .
4  S-matrix pole at a fixed ${{\mathit \rho}}$ meson mass of 775.49 MeV.
References:
 ABLIKIM 2017
PRL 118 012001 Amplitude Analysis of the Decays ${{\mathit \eta}^{\,'}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ and ${{\mathit \eta}^{\,'}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
 ABELE 1997
PL B391 191 High Mass ${{\mathit \rho}}$ Meson States from ${{\overline{\mathit p}}}{{\mathit d}}$ Annihilation at Rest into ${{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit p}}_{spect.}$
 CAPRARO 1987
NP B288 659 The ${{\mathit \rho}{(770)}}$ Radiative Decay Width: A Measurement at 200 GeV
 HUSTON 1986
PR D33 3199 Measurement of the Resonance Parameters and Radiative Width of the ${{\mathit \rho}{(770)}^{+}}$
 BYERLY 1973
PR D7 637 ${{\mathit \rho}{(770)}^{-}}$ Production and Decay in the Reaction ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{0}}{{\mathit p}}$ at 5 ${\mathrm {GeV/}}\mathit c$
 PISUT 1968
NP B6 325 ${{\mathit \rho}}$ Meson Shape
 EISNER 1967
PR 164 1699 ${{\mathit \pi}^{-}}{{\mathit p}}$ Two Prong Interactions at 4.16 ${\mathrm {GeV/}}\mathit c$
see fit info