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${{\mathit \Xi}^{0}}$ DECAY PARAMETERS

See the ``Note on Baryon Decay Parameters'' in the neutron Listings.

$\phi $ ANGLE FOR ${{\mathit \Xi}^{0}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \pi}^{0}}$ (tan$\phi $ = $\beta /\gamma $)

INSPIRE   PDGID:

S023F

VALUE ($^\circ{}$) EVTS DOCUMENT ID TECN  COMMENT $0.292$ $\pm0.550$ $\pm0.103$ 327k 1 ABLIKIM 2023 AU BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \Xi}^{0}}{{\overline{\mathit \Xi}}^{0}}$ • • We do not use the following data for averages, fits, limits, etc. • • $1.55$ $\pm6.70$ $\pm0.63$ 1.9k ABLIKIM 2023 AD BES3 ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \Xi}^{0}}{{\overline{\mathit \Xi}}^{0}}$ $16$ $\pm17$ 652 BALTAY 1974 HBC 1.75 ${\mathrm {GeV/}}\mathit c$ ${{\mathit K}^{-}}{{\mathit p}}$ $38$ $\pm19$ 739 2 DAUBER 1969 HBC $-8$ $\pm30$ 146 3 BERGE 1966 HBC 1  Converted from radians to degrees. 2  DAUBER 1969 uses $\alpha _{\Lambda }$ = $0.647$ $\pm0.020$. 3  The errors have been multiplied by 1.2 due to approximations used for the ${{\mathit \Xi}}$ polarization; see DAUBER 1969 for a discussion.

References

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