Determination of RE ($\varepsilon^{\prime} / \varepsilon$) by the Simultaneous Detection of the Four $K_{L,S} \to \pi \pi$ Decay Modes

J.Ritchie Patterson

doi:10.2172/1426713

Determination of RE ($\varepsilon^{\prime} / \varepsilon$) by the Simultaneous Detection of the Four $K_{L,S} \to \pi \pi$ Decay Modes

J.Ritchie Patterson

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https://doi.org/10.2172/1426713

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Publication Date: Dec 1, 1990

#Var Epsilon #Ital CP + Show 1 more

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Abstract

The E731 experiment at Fermilab has searched for direct {ital CP} violation in {ital K}{sup 0}{r arrow}{pi}{pi}, which is parametrized by {var epsilon}{prime}/{var epsilon}. For the first time all four of the {ital K}{sub {ital L},}{ital S}{r arrow}{pi}{pi} modes were collected simultaneously, which greatly facilitated studies of systematic uncertainty. We find Re({var epsilon}{prime}/{var epsilon})={minus}0.0004{plus minus}0.0014(stat){plus minus}0.0006(syst). The result provides no evidence for direct {ital CP} violation.

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