Measurement of the ratio Γ(KL→γγ)/Γ(KL→π0π0π0) with the KLOE detector
نویسندگان
چکیده
منابع مشابه
Upper limit on the η → π + π − branching ratio with the KLOE detector . The KLOE Collaboration
We have searched with the KLOE detector for the P and CP violating decay η → ππ in a sample of 1.55 × 10 η’s from the decay φ → ηγ of φ-mesons produced in ee annihilations at DAΦNE. No signal is found. We obtain the upper limit BR(η → ππ)< 1.3×10 at 90% confidence level.
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We present a measurement of the branching ratio of the CP violating decay KL→ ππ performed by the KLOE experiment at the φ factory DAΦNE. We use 328 pb of data collected in 2001 and 2002, corresponding to ∼ 150 million tagged KL mesons. We find BR(KL → ππ) = (1.963 ± 0.012stat. ± 0.017syst.) × 10. This branching ratio measurement is fully inclusive of final-state radiation. Using the above resu...
متن کاملMeasurement of the absolute branching ratio of the K + → π + π − π + ( γ ) decay with the KLOE detector
The absolute branching ratio of theK → πππ(γ) decay, inclusive of final-state radiation, has been measured using ∼17 million tagged K mesons collected with the KLOE detector at DAΦNE, the Frascati φ-factory. The result is: BR(K → πππ(γ)) = 0.05565 ± 0.00031stat ± 0.00025syst a factor ≃ 5 more precise with respect to the previous result. This work completes the program of precision measurements ...
متن کاملMeasurement of the absolute branching ratio of the K + → π + π 0 ( γ ) decay with the KLOE detector
We have measured the absolute branching ratio of the K+ → π+π0 (γ) decay, using ∼20 million tagged K+ mesons collected with the KLOE detector at DAΦNE, the Frascati φ–factory. Signal counts are obtained from the fit of the distribution of the momentum of the charged decay particle in the kaon rest frame. The result, inclusive of final-state radiation, is BR(K+ → π+π0 (γ))=0.2065± 0.0005stat ± 0...
متن کاملMeasurement of the branching ratio for the decay K ± → π ± π 0 π 0 with the KLOE detector
A new measurement of the absolute branching ratio BR(K → πππ) with the KLOE detector at the DAΦNE ee collider is presented, based on a sample of ∼ 3.3× 10 charged kaons tagged events, produced in the reaction ee → φ → KK. The value BR(K → πππ) = (1.781± 0.013stat ± 0.016syst)% has been obtained. The study of the non leptonic three pions decays of K has been subject of a new both theoretical and...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2003
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(03)00810-4