${{\mathit \Omega}^{-}}$ MASS INSPIRE search

The fit assumes the ${{\mathit \Omega}^{-}}$ and ${{\overline{\mathit \Omega}}^{+}}$ masses are the same, and averages them together.
S024M
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 1672.45 \pm0.29}$ OUR FIT
$\bf{ 1672.43 \pm0.32}$ OUR AVERAGE
$1673$ $\pm1$ 100
HARTOUNI
1985
SPEC 80$-$280 GeV ${{\mathit K}_L^0}$ ${}^{}\mathrm {C}$
$1673.0$ $\pm0.8$ 41
BAUBILLIER
1978
HBC 8.25 ${\mathrm {GeV/}}\mathit c$ ${{\mathit K}^{-}}{{\mathit p}}$
$1671.7$ $\pm0.6$ 27
HEMINGWAY
1978
HBC 4.2 ${\mathrm {GeV/}}\mathit c$ ${{\mathit K}^{-}}{{\mathit p}}$
$1673.4$ $\pm1.7$ 4 1
DIBIANCA
1975
DBC 4.9 ${\mathrm {GeV/}}\mathit c$ ${{\mathit K}^{-}}{{\mathit d}}$
$1673.3$ $\pm1.0$ 3
PALMER
1968
HBC ${{\mathit K}^{-}}{{\mathit p}}$ 4.6, 5 ${\mathrm {GeV/}}\mathit c$
$1671.8$ $\pm0.8$ 3
SCHULTZ
1968
HBC ${{\mathit K}^{-}}{{\mathit p}}$ 5.5 ${\mathrm {GeV/}}\mathit c$
$1674.2$ $\pm1.6$ 5
SCOTTER
1968
HBC ${{\mathit K}^{-}}{{\mathit p}}$ 6 ${\mathrm {GeV/}}\mathit c$
$1672.1$ $\pm1.0$ 1 2
FRY
1955
EMUL
• • • We do not use the following data for averages, fits, limits, etc. • • •
$1671.43$ $\pm0.78$ 13 3
DEUTSCHMANN
1973
HBC ${{\mathit K}^{-}}{{\mathit p}}$ 10 ${\mathrm {GeV/}}\mathit c$
$1671.9$ $\pm1.2$ 6 3
SPETH
1969
HBC See DEUTSCHMANN 1973
$1673.0$ $\pm8.0$ 1
ABRAMS
1964
HBC $\rightarrow$ ${{\mathit \Xi}^{-}}{{\mathit \pi}^{0}}$
$1670.6$ $\pm1.0$ 1 2
FRY
1955B
 EMUL
$1615$ 1 4
EISENBERG
1954
EMUL
1  DIBIANCA 1975 gives a mass for each event. We quote the average.
2  The FRY 1955 and FRY 1955B events were identified as ${{\mathit \Omega}^{-}}$ by ALVAREZ 1973. The masses assume decay to ${{\mathit \Lambda}}{{\mathit K}^{-}}$ at rest. For FRY 1955B, decay from an atomic orbit could Doppler shift the ${{\mathit K}^{-}}$ energy and the resulting ${{\mathit \Omega}^{-}}$ mass by several MeV. This shift is negligible for FRY 1955 because the ${{\mathit \Omega}}$ decay is approximately perpendicular to its orbital velocity, as is known because the ${{\mathit \Lambda}}$ strikes the nucleus (L.Alvarez, private communication 1973). We have calculated the error assuming that the orbital n is 4 or larger.
3  Excluded from the average; the ${{\mathit \Omega}^{-}}$ lifetimes measured by the experiments differ significantly from other measurements.
4  The EISENBERG 1954 mass was calculated for decay in flight. ALVAREZ 1973 has shown that the ${{\mathit \Omega}}$ interacted with an ${}^{}\mathrm {Ag}$ nucleus to give ${{\mathit K}^{-}}{{\mathit \Xi}}{}^{}\mathrm {Ag}$.
  References:
HARTOUNI 1985
PRL 54 628 Inclusive Production of ${{\mathit \Omega}^{-}}$ and ${{\overline{\mathit \Omega}}^{+}}$ by ${{\mathit K}_L^0}$ Carbon Interactions in the Energy Range $80 - 280$ ${\mathrm {GeV/}}\mathit c$
BAUBILLIER 1978
PL 78B 342 A Study of the Lifetime and Spin of ${{\mathit \Omega}^{-}}$ Produced in ${{\mathit K}^{-}}$ ${{\mathit p}}$ Interactions at 8.25 ${\mathrm {GeV/}}\mathit c$
HEMINGWAY 1978
NP B142 205 ${{\mathit \Omega}^{-}}$ Produced in ${{\mathit K}^{-}}$ ${{\mathit p}}$ Reactions at 4.2 ${\mathrm {GeV/}}\mathit c$
DIBIANCA 1975
NP B98 137 Study of ${{\mathit \Xi}^{-}}$ and ${{\mathit \Omega}^{-}}$ Production from ${{\mathit K}^{-}}$ ${{\mathit n}}$ and ${{\mathit K}^{-}}$ ${{\mathit p}}$ Interactions at 4.93 ${\mathrm {GeV/}}\mathit c$
DEUTSCHMANN 1973
NP B61 102 ${{\mathit \Omega}^{-}}$ Production in ${{\mathit K}^{-}}{{\mathit p}}$ Interactions
SPETH 1969
PL 29B 252 ${{\mathit \Omega}^{-}}$ Production in 10 ${\mathrm {GeV/}}\mathit c$ ${{\mathit K}^{-}}$ ${{\mathit p}}$ Interactions
PALMER 1968
PL 26B 323 Precision Measurement of the ${{\mathit \Omega}^{-}}$ and ${{\mathit \Xi}^{0}}$ Masses
SCHULTZ 1968
PR 168 1509 Production of ${{\mathit \Omega}^{-}}$ Hyperons in ${{\mathit K}^{-}}$ ${{\mathit p}}$ Interactions at 5.5 ${\mathrm {GeV/}}\mathit c$
SCOTTER 1968
PL 26B 474 ${{\mathit \Omega}^{-}}$ Productions by 6 ${\mathrm {GeV/}}\mathit c$ ${{\mathit K}^{-}}$ Mesons
ABRAMS 1964
PRL 13 670 Example of Decay ${{\mathit \Omega}^{-}}$ $\rightarrow$ ${{\mathit \Xi}^{-}}{{\mathit \pi}^{0}}$
FRY 1955B
NC 2 346 Further Evidence for Existence of a Heavy ${{\mathit K}^{-}}$ Meson of Heavy Hyperon
FRY 1955
PR 97 1189 ${{\mathit K}}$ Mesonic Decay of a Slow Secondary Particle
EISENBERG 1954
PR 96 541 Possible Existence of a New Hyperon