A new measurement of direct CP violation in two pion decays of the neutral kaon

et al; The NA48 Collaboration: V. Fanti

A new measurement of direct CP violation in two pion decays of the neutral kaon

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arxiv hep-ex/9909022 v1 pith:LFDUD4WX submitted 1999-09-13 hep-ex

The NA48 Collaboration: V. Fanti , et al This is my paper · ORCID

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The NA48 experiment at CERN has performed a new measurement of direct CP violation, based on data taken in 1997 by simultaneously collecting K_L and K_S decays into pi0pi0 and pi+pi-. The result for the CP violating parameter Re(epsilon'/epsilon) is (18.5 +/- 4.5(stat)} +/- 5.8 (syst))x10^{-4}.

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Measurement of the CP asymmetry in $D^+ \to \pi^+ \pi^0$ decays at Belle II
hep-ex 2025-06 accept novelty 5.0 of 10

The new world-best measurement of the CP asymmetry in D+ -> pi+ pi0 decays is (-1.8 +/- 0.9 +/- 0.1)%, consistent with zero and with the Standard Model.

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