Measurement of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Δ</mml:mi><mml:mi>S</mml:mi><mml:mo>=</mml:mo><mml:mo>−</mml:mo><mml:mi>Δ</mml:mi><mml:mi>Q</mml:mi></mml:math>Amplitude from<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mi>e</mml:mi><mml:mn>3</mml:mn><mml:mn /></mml:mrow></mml:msub></mml:mrow></mml:mrow><mml:mrow><mml:mn>0</mm

\Ve have investigated the weak-interaction AS =AQ selection rule in the time distribution of leptonic decays of neutral K mesons. From a sample of approximately 20 000 visible K mesons produced in the reaction^-p-Eon in the BNL 30-in. liquid-hydrogen bubble chamber, we have identified Kr i e i v (92 events); Kr;'pfv (24 events): K -i~l v , 1 charge ambiguous K -r+l ITv, 1 mass ambiguous (10 events); K -rr+ T -y , p y > 90 iVleV/c ) (72 events) . We present a maximum-likelihood determination of the amplitude ratio x = A (AS = -08 ) / A (AS = +AQ ) . Our sample of charge-identified muon and electron events yields Rex, =0.19?8:1! , I-, =0.16+!:i! , Rexp =0.35+8::;, 1 m r~= 0 . 4 2~~:~~ .Combining all 126 of our charge-identified leptonic decays, we obtain as our best resultThe AS = M prediction Rex = Imv = O lies on the 2.4-standard-deviation contour of this result.

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Measurement of theΔS=−ΔQAmplitude fromKe30

Cited by 4 publications

References 7 publications

Status of interference experiments with neutral kaons

Status of interference experiments with neutral kaons

Experimental study of the rule in the time-dependent rate of Ko → πeν

Test ofΔS=ΔQin the Time Distribution ofKl30Decays

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