${{\mathit \Xi}^{0}}$ 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
2023AU
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
2023AD
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