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TIME REVERSAL ($\mathit T$) INVARIANCE

${{\mathit e}}$ electric dipole moment

$<1.1 \times 10^{-29}$ $\mathit e~$cm CL=90.0%

${{\mathit \mu}}$ electric dipole moment $\vert $d$\vert $

$<1.8 \times 10^{-19}$ $\mathit e~$cm CL=95.0%

${{\mathit \mu}}$ decay parameters

transverse ${{\mathit e}^{+}}$ polarization normal to plane of ${{\mathit \mu}}$ spin, ${{\mathit e}^{+}}$ momentum

$-0.002$ $\pm0.008$

$\alpha {{}^\prime}/\mathit A$

$-0.010$ $\pm0.020$

$\beta {{}^\prime}/\mathit A$

$0.002$ $\pm0.007$

Re($\mathit d_{{{\mathit \tau}}}$ = ${{\mathit \tau}}$ electric dipole moment)

$-1.85 \times 10^{-17}\text{ to }6.1 \times 10^{-18} $ $\mathit e~$cm CL=95.0%

$\mathit P_{T}$ in ${{\mathit K}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \mu}^{+}}{{\mathit \nu}_{{\mu}}}$

$-0.0017$ $\pm0.0025$

$\mathit P_{T}$ in ${{\mathit K}^{+}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \nu}_{{\mu}}}{{\mathit \gamma}}$

$-0.006$ $\pm0.019$

Im($\xi $) in ${{\mathit K}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \mu}^{+}}{{\mathit \nu}_{{\mu}}}$ decay (from transverse ${{\mathit \mu}}$ pol.)

$-0.006$ $\pm0.008$

asymmetry $\mathit A_{\mathit T}$ in ${{\mathit K}^{0}}-{{\overline{\mathit K}}^{0}}$ mixing

$0.0066$ $\pm0.0016$

Im($\xi $) in ${{\mathit K}_{{\mu3}}^{0}}$ decay (from transverse ${{\mathit \mu}}$ pol.)

$-0.007$ $\pm0.026$

$\mathit A_{T}$( ${{\mathit D}^{\pm}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ )

$-0.012$ $\pm0.011$

$\mathit A_{T}$( ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ )

$0.0029$ $\pm0.0022$

$\mathit A_{T}$( ${{\mathit D}_{{s+-}}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ )

$-0.014$ $\pm0.008$

$\Delta {{\mathit S}_{{T}}^{+}}$ (S${}^{-}_{{{\mathit \ell}}{}^{-},{{\mathit K}_S^0} }$ $−$ S${}^{+}_{{{\mathit \ell}}{}^{+},{{\mathit K}_S^0} }$)

$-1.37$ $\pm0.15$

$\Delta {{\mathit S}_{{T}}^{-}}$ (S${}^{+}_{{{\mathit \ell}}{}^{-},{{\mathit K}_S^0} }$ $−$ S${}^{-}_{{{\mathit \ell}}{}^{+},{{\mathit K}_S^0} }$)

$1.17$ $\pm0.21$

$\Delta {{\mathit C}_{{T}}^{+}}$ (C${}^{-}_{{{\mathit \ell}}{}^{-},{{\mathit K}_S^0} }$ $−$ C${}^{+}_{{{\mathit \ell}}{}^{+},{{\mathit K}_S^0} }$)

$0.10$ $\pm0.16$

$\Delta {{\mathit C}_{{T}}^{-}}$ (C${}^{+}_{{{\mathit \ell}}{}^{-},{{\mathit K}_S^0} }$ $−$ C${}^{-}_{{{\mathit \ell}}{}^{+},{{\mathit K}_S^0} }$)

$0.04$ $\pm0.16$

${{\mathit p}}$ electric dipole moment

$<2.1 \times 10^{-25}$ $\mathit e~$cm

${{\mathit n}}$ electric dipole moment

$<1.8 \times 10^{-26}$ $\mathit e~$cm CL=90.0%

${{\mathit n}}$ $\rightarrow$ ${{\mathit p}}{{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{e}}}$ decay parameters

$\phi _{\mathit AV}$, phase of ${\mathit g}_{{{\mathit A}}}$ relative to ${\mathit g}_{{{\mathit V}}}$

$180.017$ $\pm0.026$ $^\circ{}$

triple correlation coefficient $\mathit D$

($-1.2$ $\pm2.0$) $ \times 10^{-4}$

triple correlation coefficient $\mathit R$

$0.004$ $\pm0.013$

${{\mathit \Lambda}}$ electric dipole moment

$<1.5 \times 10^{-16}$ $\mathit e~$cm CL=95.0%

triple correlation coefficient $\mathit D$ for ${{\mathit \Sigma}^{-}}$ $\rightarrow$ ${{\mathit n}}{{\mathit e}^{-}}{{\overline{\mathit \nu}}_{{e}}}$

$0.11$ $\pm0.10$

[1]	See the Particle Listings for the (complicated) definition of this quantity.

[2]	Time-reversal invariance requires this to be 0$^\circ{}$ or 180$^\circ{}$.

[3]	This coefficient is zero if time invariance is not violated.

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