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${{\mathit \mu}}$ MASS (atomic mass units u)
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$0.1134289259 \pm0.0000000025$ u
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${{\mathit \mu}}$ MASS
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$105.6583755 \pm0.0000023$ MeV
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${{\mathit \mu}}$ MEAN LIFE $\tau $
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$(2.1969811 \pm0.0000022) \times 10^{-6}$ s
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${\mathit \tau}_{{{\mathit \mu}^{+}}}/{\mathit \tau}_{{{\mathit \mu}^{-}}}$ MEAN LIFE RATIO
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$1.00002 \pm0.00008$
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$({\mathit \tau}_{{{\mathit \mu}^{+}}}{\mathit \tau}_{{{\mathit \mu}^{-}}})/{\mathit \tau}_{\mathrm {average}}$
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$(2 \pm8) \times 10^{-5}$
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${{\mathit \mu}}/{{\mathit p}}$ MAGNETIC MOMENT RATIO
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$3.18334514 \pm0.00000007$
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${{\mathit \mu}_{{{\mu}}}}/({{\mathit e}}\hbar{}/2{{\mathit m}_{{{\mu}}}})−$1 = (${{\mathit g}_{{{\mu}}}}−$2)/2
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$0.00116592059 \pm0.00000000022$
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$({\mathit g}_{{{\mathit \mu}^{+}}}{\mathit g}_{{{\mathit \mu}^{-}}})/{\mathit g}_{average}$
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$(-1.1 \pm1.2) \times 10^{-9}$
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${{\mathit \mu}}$ ELECTRIC DIPOLE MOMENT (d)
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$<1.8 \times 10^{-19}$ $\mathit e~$cm CL=95.0%
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MUON-ELECTRON CHARGE RATIO ANOMALY $\mathit q_{{{\mathit \mu}^{+}}}/\mathit q_{{{\mathit e}^{-}}}$ $+$ 1
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$(1.1 \pm2.1) \times 10^{-9}$
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${\mathit \sigma (}$ ${{\mathit \mu}^{-}}$ ${}^{32}\mathrm {S}$ $\rightarrow$ ${{\mathit e}^{-}}{}^{32}\mathrm {S}{)}$ / ${\mathit \sigma (}$ ${{\mathit \mu}^{-}}$ ${}^{32}\mathrm {S}$ $\rightarrow$ ${{\mathit \nu}_{{{\mu}}}}{}^{32}\mathrm {P}^{*}{)}$
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$<7 \times 10^{-11}$ CL=90.0%
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${\mathit \sigma (}$ ${{\mathit \mu}^{-}}$ ${}^{}\mathrm {Cu}$ $\rightarrow$ ${{\mathit e}^{-}}{}^{}\mathrm {Cu}{)}$ / ${\mathit \sigma (}$ ${{\mathit \mu}^{-}}$ ${}^{}\mathrm {Cu}$ $\rightarrow$ capture${)}$
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${\mathit \sigma (}$ ${{\mathit \mu}^{-}}$ ${}^{}\mathrm {Ti}$ $\rightarrow$ ${{\mathit e}^{-}}{}^{}\mathrm {Ti}{)}$ / ${\mathit \sigma (}$ ${{\mathit \mu}^{-}}$ ${}^{}\mathrm {Ti}$ $\rightarrow$ capture${)}$
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$<4.3 \times 10^{-12}$ CL=90.0%
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${\mathit \sigma (}$ ${{\mathit \mu}^{-}}$ ${}^{}\mathrm {Pb}$ $\rightarrow$ ${{\mathit e}^{-}}{}^{}\mathrm {Pb}{)}$ / ${\mathit \sigma (}$ ${{\mathit \mu}^{-}}$ ${}^{}\mathrm {Pb}$ $\rightarrow$ capture${)}$
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$<4.6 \times 10^{-11}$ CL=90.0%
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${\mathit \sigma (}$ ${{\mathit \mu}^{-}}$ ${}^{}\mathrm {Au}$ $\rightarrow$ ${{\mathit e}^{-}}{}^{}\mathrm {Au}{)}$ / ${\mathit \sigma (}$ ${{\mathit \mu}^{-}}$ ${}^{}\mathrm {Au}$ $\rightarrow$ capture${)}$
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$<7 \times 10^{-13}$ CL=90.0%
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${\mathit \sigma (}$ ${{\mathit \mu}^{-}}$ ${}^{32}\mathrm {S}$ $\rightarrow$ ${{\mathit e}^{+}}{}^{32}\mathrm {Si}^{*}{)}$ / ${\mathit \sigma (}$ ${{\mathit \mu}^{-}}$ ${}^{32}\mathrm {S}$ $\rightarrow$ ${{\mathit \nu}_{{{\mu}}}}{}^{32}\mathrm {P}^{*}{)}$
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$<9 \times 10^{-10}$ CL=90.0%
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${\mathit \sigma (}$ ${{\mathit \mu}^{-}}$ ${}^{127}\mathrm {I}$ $\rightarrow$ ${{\mathit e}^{+}}{}^{127}\mathrm {Sb}^{*}{)}$ / ${\mathit \sigma (}$ ${{\mathit \mu}^{-}}$ ${}^{127}\mathrm {I}$ $\rightarrow$ anything${)}$
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$<3 \times 10^{-10}$ CL=90.0%
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${\mathit \sigma (}$ ${{\mathit \mu}^{-}}$ ${}^{}\mathrm {Cu}$ $\rightarrow$ ${{\mathit e}^{+}}{}^{}\mathrm {Co}{)}$ / ${\mathit \sigma (}$ ${{\mathit \mu}^{-}}$ ${}^{}\mathrm {Cu}$ $\rightarrow$ ${{\mathit \nu}_{{{\mu}}}}{}^{}\mathrm {Ni}{)}$
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${\mathit \sigma (}$ ${{\mathit \mu}^{-}}$ ${}^{}\mathrm {Ti}$ $\rightarrow$ ${{\mathit e}^{+}}{}^{}\mathrm {Ca}{)}$ / ${\mathit \sigma (}$ ${{\mathit \mu}^{-}}$ ${}^{}\mathrm {Ti}$ $\rightarrow$ capture${)}$
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$<3.6 \times 10^{-11}$ CL=90.0%
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$\mathit R_{\mathit g}$ = $\mathit G_{\mathit C}$ $/$ $\mathit G_{\mathit F}$
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$<0.0030$ CL=90.0%
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$\rho $ PARAMETER
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$0.74979 \pm0.00026$
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$\eta $ PARAMETER
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$0.057 \pm0.034$
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$\delta $ PARAMETER
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$0.75047 \pm0.00034$
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$\vert (\xi $ PARAMETER)${\times }({{\mathit \mu}}$ LONGITUDINAL POLARIZATION)$\vert $
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$1.0009 {}^{+0.0016}_{-0.0007}$
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$\xi $ ${\times }$ (${{\mathit \mu}}$ LONGITUDINAL POLARIZATION) ${\times }$ $\delta $ $/$ $\rho $
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$1.0018 {}^{+0.0016}_{-0.0007}$
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$\xi {{}^\prime}$ = LONGITUDINAL POLARIZATION OF ${{\mathit e}^{+}}$
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$1.00 \pm0.04$
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$\xi {{}^\prime}{{}^\prime}$ PARAMETER
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$0.98 \pm0.04$
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TRANSVERSE ${{\mathit e}^{+}}$ POLARIZATION IN PLANE OF ${{\mathit \mu}}$ SPIN, ${{\mathit e}^{+}}$ MOMENTUM
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$0.007 \pm0.008$
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TRANSVERSE ${{\mathit e}^{+}}$ POLARIZATION NORMAL TO PLANE OF ${{\mathit \mu}}$ SPIN, ${{\mathit e}^{+}}$ MOMENTUM
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$-0.002 \pm0.008$
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$\alpha /\mathit A$
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$0.000 \pm0.004$
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$\alpha {{}^\prime}/\mathit A$
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$-0.010 \pm0.020$
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$\beta /\mathit A$
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$0.004 \pm0.006$
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$\beta {{}^\prime}/\mathit A$
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$0.002 \pm0.007$
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$\mathit a{{}^\prime}/\mathit A$
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($\mathit b{{}^\prime}+\mathit b)/\mathit A$
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$\mathit c{{}^\prime}/\mathit A$
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${{\overline{\mathit \eta}}}$ PARAMETER
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$0.02 \pm0.08$
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${{\mathit \mu}^{+}}$ modes are charge conjugates of the modes below.
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Mode |
Fraction ($\Gamma_i$ / $\Gamma$) |
Scale Factor/ Conf. Level |
P (MeV/c) |
$\Gamma_{1}$ | ${{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{{e}}}}{{\mathit \nu}_{{{\mu}}}}$ | |
$\approx{}100\%$
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| $\Gamma_{2}$ | ${{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{{e}}}}{{\mathit \nu}_{{{\mu}}}}{{\mathit \gamma}}$ | [1] |
$(6.0\pm{0.5})\times 10^{-8}$
| | 53 |
| $\Gamma_{3}$ | ${{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{{e}}}}{{\mathit \nu}_{{{\mu}}}}{{\mathit e}^{+}}{{\mathit e}^{-}}$ | [2] |
$(3.4\pm{0.4})\times 10^{-5}$
| | 53 |
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▸ | Lepton Family number ($\mathit LF$) violating modes |
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