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${{\mathit \omega}{(782)}}$ MASS

VALUE (MeV)

EVTS

DOCUMENT ID

TECN

COMMENT

$\bf{ 782.66 \pm0.13}$

OUR AVERAGE Error includes scale factor of 2.0.

See the ideogram below.

$777.9$ $\pm2.2$ ${}^{+4.3}_{-2.2}$

900k

H1

${{\mathit e}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit e}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit p}}$

$783.20$ $\pm0.13$ $\pm0.16$

18680

CMD2

0.60-1.38 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \gamma}}$

$782.68$ $\pm0.09$ $\pm0.04$

11200

CMD2

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$

$782.79$ $\pm0.08$ $\pm0.09$

1.2M

RVUE

$0.44 - 2.00$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$

$781.96$ $\pm0.17$ $\pm0.80$

11k

CBAR

$0.0$ ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit \eta}}{{\mathit \pi}^{0}}$

$782.08$ $\pm0.36$ $\pm0.82$

3463

CBAR

$0.0$ ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit \eta}}{{\mathit \pi}^{0}}$

$781.96$ $\pm0.13$ $\pm0.17$

15k

CBAR

$0.0$ ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$

$782.4$ $\pm0.2$

270k

ASTE

${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ 2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$

$782.4$ $\pm0.5$

7000

CNTR

${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit n}}$

• • We do not use the following data for averages, fits, limits, etc. • •

$782.58$ $\pm0.03$ $\pm0.01$

RVUE

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \gamma}}$

$781.68$ $\pm0.09$ $\pm0.03$

RVUE

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$

$782.63$ $\pm0.03$ $\pm0.01$

RVUE

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$

$781.91$ $\pm0.24$

BABR

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$

$782.7$ $\pm0.1$ $\pm1.5$

19500

SPEC

1.33 ${{\mathit p}}$ ${{\mathit d}}$ $\rightarrow$ ${}^{3}\mathrm {He}$ ${{\mathit \omega}}$

$781.78$ $\pm0.10$

CMD

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$

$782.2$ $\pm0.4$

1488

OLYA

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$

$783.3$ $\pm0.4$

433

DM1

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$

$782.5$ $\pm0.8$

33260

RVUE

0.0$-$3.6 ${{\overline{\mathit p}}}{{\mathit p}}$

$782.6$ $\pm0.8$

3000

OMEG

9$-$12 ${{\mathit \pi}^{\pm}}{{\mathit p}}$

$781.8$ $\pm0.6$

1430

HBC

0.7$-$0.8 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ 5 ${{\mathit \pi}}$

$782.7$ $\pm0.9$

535

HBC

7.2 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\overline{\mathit p}}}{{\mathit p}}{{\mathit \omega}}$

$783.5$ $\pm0.8$

2100

HBC

11 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit n}}$

$782.5$ $\pm0.8$

418

AGUILAR-BENIT..

HBC

3.9,4.6 ${{\mathit K}^{-}}{{\mathit p}}$

$783.4$ $\pm1.0$

248

HBC

0.0 ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \omega}}$

$781.0$ $\pm0.6$

510

HBC

0.0 ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\mathit K}_{{{1}}}}{{\mathit K}_{{{1}}}}{{\mathit \omega}}$

$783.7$ $\pm1.0$

3583

HBC

3.7 ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \pi}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$

$784.1$ $\pm1.2$

750

HBC

3.9 ${{\mathit \pi}^{-}}{{\mathit p}}$

$783.2$ $\pm1.6$

CNTR

$<$4.1 ${{\mathit \gamma}}$ ${}^{}\mathrm {C}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{}^{}\mathrm {C}$

$782.4$ $\pm0.5$

2400

HBC

0.0 ${{\overline{\mathit p}}}{{\mathit p}}$

¹	Update of AKHMETSHIN 2000C.

²

From the combined fit of ANTONELLI 1992, ACHASOV 2001E, ACHASOV 2002E, and ACHASOV 2003D data on the ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ and ANTONELLI 1992 on the ${{\mathit \omega}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ final states. Supersedes ACHASOV 1999E and ACHASOV 2002E.

³	From the ${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}$ decay.

⁴	From the ${{\mathit \eta}}$ $\rightarrow$ 3 ${{\mathit \pi}^{0}}$ decay.

⁵	Observed by threshold-crossing technique. Mass resolution = 4.8 MeV FWHM.

⁶	The values were extracted from a dispersively improved Breit-Wigner parameterization and do not include vacuum polarization. Inclusion of vacuum polarization gives $782.736$ $\pm0.024$ MeV.

⁷

The ${{\mathit \omega}}$ mass was extracted from a dispersively improved Breit-Wigner parameterization, the ${{\mathit \omega}}$ width fixed at $8.49$ $\pm0.08$ MeV. The value does not include vacuum polarization which would shift the mass to $781.81$ $\pm0.09$ $\pm0.03$ MeV. The mixing parameter is assumed real valued.

⁸	The values were extracted from a dispersively improved Breit-Wigner parameterization and do not include vacuum polarization.

⁹	From the ${{\mathit \rho}}−{{\mathit \omega}}$ interference in the ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ mass spectrum using the Breit-Wigner for the ${{\mathit \omega}}$ and leaving its mass and width as free parameters of the fit.

¹⁰	Systematic uncertainties underestimated.

¹¹	Systematic uncertainties not estimated.

¹²	From best-resolution sample of COYNE 1971.

¹³	From ${{\mathit \omega}}-{{\mathit \rho}}$ interference in the ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ mass spectrum assuming ${{\mathit \omega}}$ width 12.6 MeV.

${{\mathit \omega}{(782)}}$ mass (MeV)

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