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${{\mathit \Xi}}$ 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   PDGID:

S022A01

VALUE ($ 10^{-3} $) EVTS DOCUMENT ID TECN  COMMENT $6$ $\pm13$ $\pm6$ 73k 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. • • $-15$ $\pm51$ $\pm10$ 5.4k ABLIKIM 2022 BE BES3 ${{\mathit \psi}{(3686)}}$ $\rightarrow$ ${{\mathit \Xi}}{{\overline{\mathit \Xi}}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\overline{\mathit \Lambda}}}{{\mathit \pi}}{{\mathit \pi}}$

References:

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

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