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

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

$\Delta \Phi _{CP}$ = ($\Phi _{-}$+ $\Phi _{+}$)/2

INSPIRE   PDGID:

S022A02

VALUE ($^\circ{}$) EVTS DOCUMENT ID TECN  COMMENT $-0.28$ $\pm0.78$ $\pm0.17$ 73k 1 ABLIKIM 2022 AD 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. • • $-2.86$ $\pm2.98$ $\pm0.17$ 5.4k 2 ABLIKIM 2022 BE BES3 ${{\mathit \psi}{(3686)}}$ $\rightarrow$ ${{\mathit \Xi}}{{\overline{\mathit \Xi}}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\overline{\mathit \Lambda}}}{{\mathit \pi}}{{\mathit \pi}}$ 1  Converted from radians to degrees. ABLIKIM 2022AD reports a value of ($-5$ $\pm14$ $\pm3$) $ \times 10^{-3}$ radians. 2  Converted from radians to degrees. ABLIKIM 2022BE reports a value of $-0.050$ $\pm0.052$ $\pm0.003$ radians.

References:

ABLIKIM 2022BE PR D106 L091101 Observation of ${\mathrm{?}}^{-}$ hyperon transverse polarization in $?(3686)?{\mathrm{?}}^{-}{\overline{\mathrm{?}}}^{+}$ ABLIKIM 2022AD NAT 606 64 Probing CP symmetry and weak phases with entangled double-strange baryons

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