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${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \pi}^{0}}$2 ${{\mathit \gamma}}$ Decay Mode Summary INSPIRE PDGID:

Category:

Neutral modes

The following data is related to the above value:

▸ expand all datablocks

$\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ neutral modes$)/\Gamma_{\text{total}}$

$\Gamma_{1}/\Gamma$

$\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ 2 ${{\mathit \gamma}}$ $)/\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ neutral modes$)$

$\Gamma_{2}/\Gamma_{1}$

$\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ 3 ${{\mathit \pi}^{0}}$ $)/\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ neutral modes$)$

$\Gamma_{3}/\Gamma_{1}$

$\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \pi}^{0}}$2 ${{\mathit \gamma}}$ $)/\Gamma_{\text{total}}$

$\Gamma_{4}/\Gamma$

$\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \pi}^{0}}$2 ${{\mathit \gamma}}$ $)/\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ 2 ${{\mathit \gamma}}$ $)$

$\Gamma_{4}/\Gamma_{2}$

$\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \pi}^{0}}$2 ${{\mathit \gamma}}$ $)/\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ 3 ${{\mathit \pi}^{0}}$ $)$

$\Gamma_{4}/\Gamma_{3}$

$\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ neutral modes$)/\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ $)$

$\Gamma_{1}/\Gamma_{9}$

$\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ neutral modes$)/[\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ $)$+ $\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \gamma}}$ $)$+ $\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \gamma}}$ $)\rbrack{}$

$\Gamma_{1}/(\Gamma_{9}$+ $\Gamma_{10}$+ $\Gamma_{11}$)

$\Gamma($ ${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \pi}^{0}}$2 ${{\mathit \gamma}}$ $)$

$\Gamma_{4}$

Except where otherwise noted, content of the 2023 Review of Particle Physics is licensed under a Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license. The publication of the Review of Particle Physics is supported by US DOE, MEXT (Japan), INFN (Italy), JPS and CERN. Individual collaborators receive support for their PDG activities from their respective institutes or funding agencies. © 2023. See LBNL disclaimers.

Mode ^(*)

Fraction ($\Gamma_i$ / $\Gamma$)

Scale Factor/
Conf. Level

P(MeV/c)

$\Gamma_{4}$

${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \pi}^{0}}$2 ${{\mathit \gamma}}$

($2.55$ $\pm0.22$) $ \times 10^{-4}$