|
$\Gamma\mathrm {( {{\mathit \pi}^{0}} \rightarrow 3 {{\mathit \gamma}})}$ $/$ $\Gamma\mathrm {(total)}$
|
$<3.1\times 10^{-8}$
CL=90.0%
|
|
|
$\Gamma\mathrm {(({{\mathit e}^{+}} {{\mathit e}^{-}})_{\mathit J = 0} \rightarrow 3 {{\mathit \gamma}})}/\Gamma\mathrm {(({{\mathit e}^{+}} {{\mathit e}^{-}})_{\mathit J = 0} \rightarrow 2 {{\mathit \gamma}})}$
|
$<1 \times 10^{-5}$
CL=90.0%
|
|
|
$\Gamma\mathrm {(({{\mathit e}^{+}} {{\mathit e}^{-}})_{\mathit J = 1} \rightarrow 4 {{\mathit \gamma}})}/\Gamma\mathrm {(({{\mathit e}^{+}} {{\mathit e}^{-}})_{\mathit J = 1} \rightarrow 3 {{\mathit \gamma}})}$
|
$<1 \times 10^{-5}$
CL=90.0%
|
|
|
${{\mathit \eta}}$ $\mathit C$-nonconserving decay parameters
|
|
${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ left-right asymmetry
|
$0.0009$ ${}^{+0.0011}_{-0.0012}$
|
|
|
${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ sextant asymmetry
|
$0.0012$ ${}^{+0.0010}_{-0.0011}$
|
|
|
${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ quadrant asymmetry
|
($-9$ $\pm9$) $ \times 10^{-4}$
|
|
|
${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$ left-right asymmetry
|
$0.009$ $\pm0.004$
|
|
|
${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$ parameter $\beta $ (${\mathit D}{\mathrm -wave}$)
|
$-0.02$ $\pm0.07$
(S = 1.3)
|
|
|
$\Gamma\mathrm {( {{\mathit \eta}} \rightarrow 3 {{\mathit \pi}^{0}} {{\mathit \gamma}})}$ $/$ $\Gamma\mathrm {(total)}$
|
$<6\times 10^{-5}$
CL=90.0%
|
|
|
$\Gamma\mathrm {( {{\mathit \eta}} \rightarrow {{\mathit \pi}^{0}} {{\mathit \gamma}})}$ $/$ $\Gamma\mathrm {(total)}$
|
[1]
|
$<9\times 10^{-5}$
CL=90.0%
|
|
|
$\Gamma\mathrm {( {{\mathit \eta}} \rightarrow 2 {{\mathit \pi}^{0}} {{\mathit \gamma}})}$ $/$ $\Gamma\mathrm {(total)}$
|
$<5\times 10^{-4}$
CL=90.0%
|
|
|
$\Gamma\mathrm {( {{\mathit \eta}} \rightarrow 3 {{\mathit \gamma}})}$ $/$ $\Gamma\mathrm {(total)}$
|
$<1.6\times 10^{-5}$
CL=90.0%
|
|
|
$\Gamma\mathrm {( {{\mathit \eta}} \rightarrow {{\mathit \pi}^{0}} {{\mathit \mu}^{+}} {{\mathit \mu}^{-}})}$ $/$ $\Gamma\mathrm {(total)}$
|
[2]
|
$<5\times 10^{-6}$
CL=90.0%
|
|
|
$\Gamma\mathrm {( {{\mathit \eta}} \rightarrow {{\mathit \pi}^{0}} {{\mathit e}^{+}} {{\mathit e}^{-}})}$ $/$ $\Gamma\mathrm {(total)}$
|
[2]
|
$<8\times 10^{-6}$
CL=90.0%
|
|
|
$\Gamma\mathrm {( {{\mathit \omega}{(782)}} \rightarrow 2 {{\mathit \pi}^{0}})}$ $/$ $\Gamma\mathrm {(total)}$
|
$<2.2\times 10^{-4}$
CL=90.0%
|
|
|
$\Gamma\mathrm {( {{\mathit \omega}{(782)}} \rightarrow 3 {{\mathit \pi}^{0}})}$ $/$ $\Gamma\mathrm {(total)}$
|
$<2.3\times 10^{-4}$
CL=90.0%
|
|
|
$\Gamma\mathrm {( {{\mathit \omega}{(782)}} \rightarrow {{\mathit \eta}} {{\mathit \pi}^{0}})}$ $/$ $\Gamma\mathrm {(total)}$
|
$<2.1\times 10^{-4}$
CL=90.0%
|
|
|
${{\mathit \eta}^{\,'}{(958)}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$ decay asymmetry parameter
|
$-0.03$ $\pm0.04$
|
|
|
$\Gamma\mathrm {( {{\mathit \eta}^{\,'}{(958)}} \rightarrow 3 {{\mathit \gamma}})}$ $/$ $\Gamma\mathrm {(total)}$
|
$<1.0\times 10^{-4}$
CL=90.0%
|
|
|
$\Gamma\mathrm {( {{\mathit \eta}^{\,'}{(958)}} \rightarrow {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} {{\mathit \pi}^{0}})}$ $/$ $\Gamma\mathrm {(total)}$
|
[2]
|
$<6.0\times 10^{-5}$
CL=90.0%
|
|
|
$\Gamma\mathrm {( {{\mathit \eta}^{\,'}{(958)}} \rightarrow {{\mathit \mu}^{+}} {{\mathit \mu}^{-}} {{\mathit \eta}})}$ $/$ $\Gamma\mathrm {(total)}$
|
[2]
|
$<1.5\times 10^{-5}$
CL=90.0%
|
|
|
$\Gamma\mathrm {( {{\mathit \eta}^{\,'}{(958)}} \rightarrow {{\mathit \pi}^{0}} {{\mathit \rho}^{0}})}$ $/$ $\Gamma\mathrm {(total)}$
|
$<4\%$
CL=90.0%
|
|
|
$\Gamma\mathrm {( {{\mathit \eta}^{\,'}{(958)}} \rightarrow {{\mathit \eta}} {{\mathit e}^{+}} {{\mathit e}^{-}})}$ $/$ $\Gamma\mathrm {(total)}$
|
[2]
|
$<2.4\times 10^{-3}$
CL=90.0%
|
|
|
$\Gamma\mathrm {( {{\mathit \eta}^{\,'}{(958)}} \rightarrow {{\mathit \pi}^{0}} {{\mathit e}^{+}} {{\mathit e}^{-}})}$ $/$ $\Gamma\mathrm {(total)}$
|
[2]
|
$<1.4\times 10^{-3}$
CL=90.0%
|
|
|
$\Gamma\mathrm {( {{\mathit J / \psi}{(1S)}} \rightarrow {{\mathit \gamma}} {{\mathit \phi}})}$ $/$ $\Gamma\mathrm {(total)}$
|
$<1.4\times 10^{-6}$
CL=90.0%
|
|
|
$\Gamma\mathrm {( {{\mathit J / \psi}{(1S)}} \rightarrow {{\mathit \gamma}} {{\mathit \gamma}})}$ $/$ $\Gamma\mathrm {(total)}$
|
$<2.7\times 10^{-7}$
CL=90.0%
|
|
| |
|
[1] |
Forbidden by angular momentum conservation.
|
|
|
[2] |
$\mathit C$ parity forbids this to occur as a single-photon process.
|
|
