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

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

($\alpha $ + ${{\overline{\mathit \alpha}}}$) $/$ ($\alpha $ $−$ ${{\overline{\mathit \alpha}}}$) for ${{\mathit \Xi}^{-}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \pi}^{-}}$, ${{\overline{\mathit \Xi}}^{+}}$ $\rightarrow$ ${{\overline{\mathit \Lambda}}}{{\mathit \pi}^{+}}$ INSPIRE search

S022A01
VALUE ($ 10^{-3} $) EVTS DOCUMENT ID TECN  COMMENT
$-9$ $\pm8$ ${}^{+7}_{-2}$ 267k
ABLIKIM
2024AR
 BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \Xi}}{{\overline{\mathit \Xi}}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\overline{\mathit \Lambda}}}{{\mathit \pi}}{{\mathit \pi}}$
• • • We do not use the following data for averages, fits, limits, etc. • • •
$6$ $\pm13$ $\pm6$ 73k
ABLIKIM
2022AD
 BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \Xi}}{{\overline{\mathit \Xi}}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\overline{\mathit \Lambda}}}{{\mathit \pi}}{{\mathit \pi}}$
$-15$ $\pm51$ $\pm10$ 5.4k
ABLIKIM
2022BE
 BES3 ${{\mathit \psi}{(3686)}}$ $\rightarrow$ ${{\mathit \Xi}}{{\overline{\mathit \Xi}}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\overline{\mathit \Lambda}}}{{\mathit \pi}}{{\mathit \pi}}$
  References:
ABLIKIM 2024AR
PRL 132 101801 Investigating the $\Delta I = 1/2$ rule and CP violation through the measurement of decay asymmetry parameters in $\Xi^-$ decays
ABLIKIM 2022BE
PR D106 L091101 Observation of ?- hyperon transverse polarization in ?(3686)??-?¯+
ABLIKIM 2022AD
NAT 606 64 Probing CP symmetry and weak phases with entangled double-strange baryons