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${{\mathit \Sigma}^{-}}$ MASS
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$1197.449 \pm0.030$ MeV (S = 1.2)
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${\mathit m}_{{{\mathit \Sigma}^{-}}}{\mathit m}_{{{\mathit \Sigma}^{+}}}$
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$8.08 \pm0.08$ MeV (S = 1.9)
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${\mathit m}_{{{\mathit \Sigma}^{-}}}{\mathit m}_{{{\mathit \Lambda}}}$
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$81.766 \pm0.030$ MeV (S = 1.2)
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${{\mathit \Sigma}^{-}}$ MEAN LIFE
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$(1.479 \pm0.011) \times 10^{-10}$ s (S = 1.3)
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${{\mathit \Sigma}^{-}}$ MAGNETIC MOMENT
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$-1.160 \pm0.025$ $\mu _{\mathit N}$ (S = 1.7)
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${{\mathit \Sigma}^{-}}$ CHARGE RADIUS
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$0.78 \pm0.10$ fm
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$\alpha _{−}$ FOR ${{\mathit \Sigma}^{-}}$ $\rightarrow$ ${{\mathit n}}{{\mathit \pi}^{-}}$
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$-0.068 \pm0.008$
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$\phi $ ANGLE FOR ${{\mathit \Sigma}^{-}}$ $\rightarrow$ ${{\mathit n}}{{\mathit \pi}^{-}}$ (tan$\phi $ = $\beta $ $/$ $\gamma $)
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$10 \pm15$ $^\circ{}$
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${\mathit g}_{{{\mathit A}}}/{\mathit g}_{{{\mathit V}}}$ FOR ${{\mathit \Sigma}^{-}}$ $\rightarrow$ ${{\mathit n}}{{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{e}}}$
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$0.340 \pm0.017$
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$\mathit f_{2}(0)/\mathit f_{1}$(0) FOR ${{\mathit \Sigma}^{-}}$ $\rightarrow$ ${{\mathit n}}{{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{e}}}$
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$0.97 \pm0.14$
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TRIPLE CORRELATION COEFFICIENT $\mathit D$ for ${{\mathit \Sigma}^{-}}$ $\rightarrow$ ${{\mathit n}}{{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{e}}}$
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$0.11 \pm0.10$
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${\mathit g}_{{{\mathit V}}}/{\mathit g}_{{{\mathit A}}}$ FOR ${{\mathit \Sigma}^{-}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{e}}}$
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$0.01 \pm0.10$ (S = 1.5)
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${\mathit g}_{\mathit WM}/{\mathit g}_{{{\mathit A}}}$ FOR ${{\mathit \Sigma}^{-}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{e}}}$
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$2.4 \pm1.7$
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Mode |
Fraction ($\Gamma_i$ / $\Gamma$) |
Scale Factor/ Conf. Level |
P (MeV/c) |
$\Gamma_{1}$ | ${{\mathit n}}{{\mathit \pi}^{-}}$ | |
$(99.848\pm{0.005})\%$
| S=1.0 | 193 |
| $\Gamma_{2}$ | ${{\mathit n}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$ | [1] |
$(4.6\pm{0.6})\times 10^{-4}$
| | 193 |
| $\Gamma_{3}$ | ${{\mathit n}}{{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{e}}}$ | |
$(1.017\pm{0.034})\times 10^{-3}$
| S=1.0 | 230 |
| $\Gamma_{4}$ | ${{\mathit n}}{{\mathit \mu}^{-}}{{\overline{\mathit \nu}}_{{\mu}}}$ | |
$(4.5\pm{0.4})\times 10^{-4}$
| | 210 |
| $\Gamma_{5}$ | ${{\mathit \Lambda}}{{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{e}}}$ | |
$(5.73\pm{0.27})\times 10^{-5}$
| S=1.0 | 79 |
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