${{\mathit \Xi}^{0}}$ 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 search

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:
ABLIKIM 2023AD
PR D108 L011101 First simultaneous measurement of ?0 and ?¯0 asymmetry parameters in ?(3686) decay
ABLIKIM 2023AU
PR D108 L031106 Tests of $CP$ symmetry in the entangled $\Xi^0-\bar{\Xi}^0$ Pairs
BALTAY 1974
PR D9 49 Properties of ${{\mathit \Xi}^{-}}$ and ${{\mathit \Xi}^{0}}$ Hyperons
DAUBER 1969
PR 179 1262 Production and Decay of Cascade Hyperons
BERGE 1966
PR 147 945 Some Properties of ${{\mathit \Xi}^{-}}$ and ${{\mathit \Xi}^{0}}$ Hyperons Produced in ${{\mathit K}^{-}}$ ${{\mathit p}}$ Interactions between 1.05 and 1.7 ${\mathrm {GeV/}}\mathit c$