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

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

NEUTRAL ONLY, PHOTOPRODUCED INSPIRE search

M009M0P
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 769.2 \pm0.9}$ OUR AVERAGE
$770.8$ $\pm1.3$ ${}^{+2.3}_{-2.4}$ 900k
ANDREEV
2020
H1 ${{\mathit e}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit e}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit p}}$
$771$ $\pm2$ ${}^{+2}_{-1}$ 63.5k 1
ABRAMOWICZ
2012
ZEUS ${{\mathit e}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit e}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit p}}$
$770$ $\pm2$ $\pm1$ 79k 2
BREITWEG
1998B
 ZEUS $50 - 100$ ${{\mathit \gamma}}{{\mathit p}}$
$767.6$ $\pm2.7$
BARTALUCCI
1978
CNTR ${{\mathit \gamma}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit p}}$
$775$ $\pm5$
GLADDING
1973
CNTR 2.9$-$4.7 ${{\mathit \gamma}}{{\mathit p}}$
$767$ $\pm4$ 1930
BALLAM
1972
HBC 2.8 ${{\mathit \gamma}}{{\mathit p}}$
$770$ $\pm4$ 2430
BALLAM
1972
HBC 4.7 ${{\mathit \gamma}}{{\mathit p}}$
$765$ $\pm10$
ALVENSLEBEN
1970
CNTR ${{\mathit \gamma}}{}^{}\mathrm {A}$, $\mathit t$ $<$0.01
$767.7$ $\pm1.9$ 140k
BIGGS
1970
CNTR $<$4.1 ${{\mathit \gamma}}$ ${}^{}\mathrm {C}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{}^{}\mathrm {C}$
$765$ $\pm5$ 4000
ASBURY
1967B
 CNTR ${{\mathit \gamma}}{+}$ ${}^{}\mathrm {Pb}$
• • • We do not use the following data for averages, fits, limits, etc. • • •
$771$ $\pm2$ 79k 3
BREITWEG
1998B
 ZEUS $50 - 100$ ${{\mathit \gamma}}{{\mathit p}}$
1  Using the KUHN 1990 parametrization of the pion form factor, neglecting ${{\mathit \rho}}−{{\mathit \omega}}$ interference.
2  From the parametrization according to SOEDING 1966.
3  From the parametrization according to ROSS 1966.
  References:
ANDREEV 2020
EPJ C80 1189 Measurement of exclusive $\pi^+ \pi ^-$ and $\rho^0$ meson photoproduction at HERA
ABRAMOWICZ 2012
EPJ C72 1869 Exclusive Electroproduction of Two Pions at HERA
BREITWEG 1998B
EPJ C2 247 Measurement of Elastic ${{\mathit \rho}^{0}}$ Photoproduction at HERA
BARTALUCCI 1978
NC 44A 587 Measurement of the Photoproduction Phases of the ${{\mathit \rho}}$, ${{\mathit \omega}}$, and ${{\mathit \phi}}$ Mesons
GLADDING 1973
PR D8 3721 Measurement of Photoproduction of ${{\mathit \omega}}$ and ${{\mathit \rho}{(770)}^{0}}$ Mesons in Hydrogen
BALLAM 1972
PR D5 545 Bubble Chamber Study of Photoproduction by 2.8 and 4.7 GeV Polarized Photons. I. Cross Section Determinations and Production of ${{\mathit \rho}{(770)}^{0}}$ and ${{\mathit \Delta}{(1232)}}$ in the Reaction of ${{\mathit \gamma}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
ALVENSLEBEN 1970
PRL 24 786 Photoproduction of Neutral ${{\mathit \rho}}$ Mesons from Complex Nuclei
BIGGS 1970
PRL 24 1197 Observation of ${{\mathit \rho}}$ ${{\mathit \omega}}$ Interference in the Photoproduction of Electron Positron Pairs from Carbon and a Measurement of the ${{\mathit \rho}}$ $−$ ${{\mathit \omega}}$ Phase
ASBURY 1967B
PRL 19 865 High Energy Photoproduction of Neutral ${{\mathit \rho}{(770)}^{0}}$ Mesons on Complex Nuclei