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${{\mathit \Sigma}^{-}}$ MEAN LIFE

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S020T

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.  See the ideogram below. $1.480$ $\pm0.014$ 16k MARRAFFINO 1980 HBC ${{\mathit K}^{-}}{{\mathit p}}$ 0.42$-$0.5 ${\mathrm {GeV/}}\mathit c$ $1.49$ $\pm0.03$ 8437 CONFORTO 1976 HBC ${{\mathit K}^{-}}{{\mathit p}}$ 1$-$1.4 ${\mathrm {GeV/}}\mathit c$ $1.463$ $\pm0.039$ 2400 ROBERTSON 1972 HBC ${{\mathit K}^{-}}{{\mathit p}}$ 0.25 ${\mathrm {GeV/}}\mathit c$ $1.42$ $\pm0.05$ 1383 BAKKER 1971 DBC ${{\mathit K}^{-}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit \Sigma}^{-}}{{\mathit \pi}}{{\mathit \pi}}$ $1.41$ ${}^{+0.09}_{-0.08}$ TOVEE 1971 EMUL $1.485$ $\pm0.022$ 100k EISELE 1970 HBC ${{\mathit K}^{-}}{{\mathit p}}$ at rest $1.472$ $\pm0.016$ 10k BARLOUTAUD 1969 HBC ${{\mathit K}^{-}}{{\mathit p}}$ 0.4$-$1.2 ${\mathrm {GeV/}}\mathit c$ $1.38$ $\pm0.07$ 506 WHITESIDE 1968 HBC ${{\mathit K}^{-}}{{\mathit p}}$ at rest $1.666$ $\pm0.075$ 3267 1 CHANG 1966 HBC ${{\mathit K}^{-}}{{\mathit p}}$ at rest $1.58$ $\pm0.06$ 1208 HUMPHREY 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(${{\mathit \Sigma}^{+}}$) = ( ${{\mathit \Sigma}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit n}}$ )/( ${{\mathit \Sigma}^{+}}$ $\rightarrow$ ) Also Thesis Nevis 145 Lifetime of ${{\mathit \Sigma}^{+}}$ and the Branching Ratios for Non-Leptonic ${{\mathit \Sigma}^{+}}$ Decays HUMPHREY 1962 PR 127 1305 Low Energy Interactions of ${{\mathit K}^{-}}$ Mesons in Hydrogen