# ${{\boldsymbol \Sigma}^{-}}$ MEAN LIFE INSPIRE search

Measurements with an error ${}\geq{}$ $0.2 \times 10^{-10}$ s have been omitted.
VALUE ($10^{-10}$ s) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 1.479 \pm0.011}$ OUR AVERAGE  Error includes scale factor of 1.3.
$1.480$ $\pm0.014$ 16k
 1980
HBC ${{\mathit K}^{-}}{{\mathit p}}$ 0.42$-$0.5 ${\mathrm {GeV/}}\mathit c$
$1.49$ $\pm0.03$ 8437
 1976
HBC ${{\mathit K}^{-}}{{\mathit p}}$ 1$-$1.4 ${\mathrm {GeV/}}\mathit c$
$1.463$ $\pm0.039$ 2400
 1972
HBC ${{\mathit K}^{-}}{{\mathit p}}$ 0.25 ${\mathrm {GeV/}}\mathit c$
$1.42$ $\pm0.05$ 1383
 1971
DBC ${{\mathit K}^{-}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit \Sigma}^{-}}{{\mathit \pi}}{{\mathit \pi}}$
$1.41$ ${}^{+0.09}_{-0.08}$
 1971
EMUL
$1.485$ $\pm0.022$ 100k
 1970
HBC ${{\mathit K}^{-}}{{\mathit p}}$ at rest
$1.472$ $\pm0.016$ 10k
 1969
HBC ${{\mathit K}^{-}}{{\mathit p}}$ 0.4$-$1.2 ${\mathrm {GeV/}}\mathit c$
$1.38$ $\pm0.07$ 506
 1968
HBC ${{\mathit K}^{-}}{{\mathit p}}$ at rest
$1.666$ $\pm0.075$ 3267 1
 1966
HBC ${{\mathit K}^{-}}{{\mathit p}}$ at rest
$1.58$ $\pm0.06$ 1208
 1962
HBC ${{\mathit K}^{-}}{{\mathit p}}$ at rest
1  We have increased the CHANG 1966 error of 0.026; see our 1970 edition, Reviews of Modern Physics 42 87 (1970).

${{\mathit \Sigma}^{-}}$ mean life (${10^{-10}}$s)
References:
 MARRAFFINO 1980
PR D21 2501 New Measurement of ${{\mathit \Sigma}}$ Decay Properties and a Test of the ${{\mathit \Delta}}\mathit I={1\over 2}$ Rule
 CONFORTO 1976
NP B105 189 ${{\mathit K}^{-}}{{\mathit p}}$ Reactions from 0.960 to 1.355 ${\mathrm {GeV/}}\mathit c$ Involving Two Body Final States
 ROBERTSON 1972
Thesis UMI 78-00877 147 ${\mathrm {GeV/}}\mathit c$ ${{\mathit K}^{-}}{{\mathit p}}$ Interactions in the Fermilab Proportional Wire Hybrid Bubble Chamber Spectrometer
 BAKKER 1971
LNC 1 37 A Measurement of the Lifetimes of the ${{\mathit \Sigma}^{\pm}}$ Hyperons. SABRE Collaboration
 TOVEE 1971
NP B33 493 Some Properties of the Charged ${{\mathit \Sigma}}$ Hyperons
 EISELE 1970
ZPHY 238 372 Measurement of the ${{\mathit \Sigma}^{\pm}}$ Lifetimes
 BARLOUTAUD 1969
NP B14 153 Measurement of the Lifetimes of the ${{\mathit \Sigma}^{\pm}}$ Hyperons and of the Branching Ratio of the Non Leptonic ${{\mathit \Sigma}^{+}}$ Decay
 WHITESIDE 1968
NC 54A 537 Lifetime of the ${{\mathit \Sigma}^{-}}$ Hyperon
 CHANG 1966
PR 151 1081 ${{\mathit \Sigma}^{\pm}}$ Lifetime and the Branching Ratio Br(${{\mathit \Sigma}^{+}}$) = ( ${{\mathit \Sigma}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit n}}$ )/( ${{\mathit \Sigma}^{+}}$ $\rightarrow$ )
 HUMPHREY 1962
PR 127 1305 Low Energy Interactions of ${{\mathit K}^{-}}$ Mesons in Hydrogen