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

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

$\alpha $ FOR ${{\mathit \Xi}^{0}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \pi}^{0}}$ INSPIRE search

The PDG 2022 average $\alpha\mathrm {({{\mathit \Xi}^{0}})}\alpha _{−}({{\mathit \Lambda}}$) = $-0.261$ $\pm0.006$ divided by the PDG 2022 average $\alpha _{−}({{\mathit \Lambda}}$) = $0.748$ $\pm0.007$ gives $\alpha\mathrm {({{\mathit \Xi}^{0}})}$ = $-0.349$ $\pm0.009$.
S023A
VALUE EVTS DOCUMENT ID TECN  COMMENT
$\bf{ -0.348 \pm0.009}$ OUR EVALUATION
$-0.3750$ $\pm0.0034$ $\pm0.0016$ 327k
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. • • •
$-0.358$ $\pm0.042$ $\pm0.013$ 1.9k
ABLIKIM
2023AD
 BES3 ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \Xi}^{0}}{{\overline{\mathit \Xi}}^{0}}$
  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