Table 1 Summary of results

From: Probing CP symmetry and weak phases with entangled double-strange baryons

Parameter

This work

Previous result

Reference

αψ

0.586 ± 0.012 ± 0.010

0.58 ± 0.04 ± 0.08

Ref. 49

ΔΦ

1.213 ± 0.046 ± 0.016 rad

–

 

αΞ

−0.376 ± 0.007 ± 0.003

−0.401 ± 0.010

Ref. 26

ϕΞ

0.011 ± 0.019 ± 0.009 rad

−0.037 ± 0.014 rad

Ref. 26

\({\bar{\alpha }}_{{\Xi }}\)

0.371 ± 0.007 ± 0.002

–

 

\({\bar{\phi }}_{\varXi }\)

−0.021 ± 0.019 ± 0.007 rad

–

 

αΛ

0.757 ± 0.011 ± 0.008

0.750 ± 0.009 ± 0.004

Ref. 4

\({\bar{\alpha }}_{{\Lambda }}\)

−0.763 ± 0.011 ± 0.007

−0.758 ± 0.010 ± 0.007

Ref. 4

ξP − ξS

(1.2 ± 3.4 ± 0.8) × 10−2 rad

–

 

δP − δS

(−4.0 ± 3.3 ± 1.7) × 10−2 rad

(10.2 ± 3.9) × 10−2 rad

Ref. 3

\({A}_{{\rm{CP}}}^{{\Xi }}\)

(6 ± 13 ± 6) × 10−3

–

 

\(\varDelta {\phi }_{{\rm{CP}}}^{{\Xi }}\)

(−5 ± 14 ± 3) × 10−3 rad

–

 

\({A}_{{\rm{CP}}}^{{\Lambda }}\)

(−4 ± 12 ± 9) × 10−3

(−6 ± 12 ± 7) × 10−3

Ref. 4

⟨ϕΞ⟩

0.016 ± 0.014 ± 0.007 rad

  
  1. The \(J/\psi \to {\varXi }^{-}{\bar{\varXi }}^{+}\) angular distribution parameter αψ, the hadronic form factor phase ΔΦ, the decay parameters for Ξ− → Λπ− (αΞ, ϕΞ), \({\bar{\varXi }}^{+}\to \bar{\varLambda }{\pi }^{+}\) (\({\bar{\alpha }}_{\varXi },{\bar{\phi }}_{\varXi }\)) Λ → pπ− (αΛ) and \(\bar{\varLambda }\to \bar{p}{\pi }^{+}\) (\({\bar{\alpha }}_{{\Lambda }}\)); the CP asymmetries \({A}_{{\rm{CP}}}^{{\Xi }}\), \(\varDelta {\phi }_{{\rm{CP}}}^{{\Xi }}\) and \({A}_{{\rm{CP}}}^{{\Lambda }}\), and the average ⟨ϕΞ⟩. The first and second uncertainties are statistical and systematic, respectively.
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