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

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

NEUTRAL ONLY, OTHER REACTIONS

INSPIRE   JSON  (beta) PDGID:
M009W0R
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 150.9 \pm1.7}$ OUR AVERAGE  Error includes scale factor of 1.1.
$122$ $\pm20$
BERTIN
1997C
 OBLX 0.0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
$145.7$ $\pm5.3$
WEIDENAUER
1993
ASTE ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \omega}}$
$144.9$ $\pm3.7$
DUBNICKA
1989
RVUE ${{\mathit \pi}}$ form factor
$148$ $\pm6$ 1, 2
BOHACIK
1980
RVUE
$152$ $\pm9$ 3
WICKLUND
1978
ASPK 3,4,6 ${{\mathit \pi}^{\pm}}{{\mathit p}}{{\mathit N}}$
$154$ $\pm2$ 76k
DEUTSCHMANN
1976
HBC 16 ${{\mathit \pi}^{+}}{{\mathit p}}$
$157$ $\pm8$ 6.8k 4
RATCLIFF
1972
ASPK 15 ${{\mathit \pi}^{-}}{{\mathit p}}$, $\mathit t$ $<$0.3
$143$ $\pm8$ 1.7k
REYNOLDS
1969
HBC 2.26 ${{\mathit \pi}^{-}}{{\mathit p}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$150.85$ $\pm0.55$ $\pm0.67$ 970k 5
ABLIKIM
2018C
 BES3 ${{\mathit \eta}^{\,'}{(958)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$150.18$ $\pm0.55$ $\pm0.65$ 970k 6
ABLIKIM
2018C
 BES3 ${{\mathit \eta}^{\,'}{(958)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$147.0$ $\pm2.5$ 600k 7
ABELE
1999E
 CBAR 0.0 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
$146$ $\pm3$ 4.9k 8
ADAMS
1997
E665 470 ${{\mathit \mu}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \mu}}$
$160.0$ ${}^{+4.1}_{-4.0}$ 9
CHABAUD
1983
ASPK 17 ${{\mathit \pi}^{-}}{{\mathit p}}$ polarized
$155$ $\pm1$ 10
HEYN
1981
RVUE ${{\mathit \pi}}$ form factor
$148.0$ $\pm1.3$ 1, 2
LANG
1979
RVUE
$146$ $\pm14$ 4.1k
ENGLER
1974
DBC 6 ${{\mathit \pi}^{+}}$ ${{\mathit n}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit p}}$
$143$ $\pm13$ 2
ESTABROOKS
1974
RVUE 17 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit n}}$
$160$ $\pm10$ 32k 1
PROTOPOPESCU
1973
HBC 7.1 ${{\mathit \pi}^{+}}{{\mathit p}}$, $\mathit t$ $<$0.4
$145$ $\pm12$ 2.2k 11, 3
HYAMS
1968
OSPK 11.2 ${{\mathit \pi}^{-}}{{\mathit p}}$
$163$ $\pm15$ 13.3k 12
PISUT
1968
RVUE 1.7$-$3.2 ${{\mathit \pi}^{-}}{{\mathit p}}$, $\mathit t$ $<$10
1  From pole extrapolation.
2  From phase shift analysis of GRAYER 1974 data.
3  Width errors enlarged by us to 4${}\Gamma /\sqrt {\mathit N }$; see the note with the ${{\mathit K}^{*}{(892)}}$ mass.
4  Published values contain misprints. Corrected by private communication RATCLIFF 1974.
5  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.
6  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.
7  Using relativistic Breit-Wigner and taking into account ${{\mathit \rho}}-{{\mathit \omega}}$ interference.
8  Systematic errors not evaluated.
9  From fit of 3-parameter relativistic Breit-Wigner to helicity-zero part of ${\mathit P}{\mathrm -wave}$ intensity. CHABAUD 1983 includes data of GRAYER 1974.
10  HEYN 1981 includes all spacelike and timelike $\mathit F_{{{\mathit \pi}}}$ values until 1978.
11  Of HYAMS 1968 six parametrizations this is theoretically soundest. MR
12  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.
References