What does this research mean for the field?

The ratio Rsπ = Γ(KS→π+ π- (γ))/Γ(KS→π0 π 0) is measured to be 2.236 ± 0.003 (stat) ± 0.015 (syst). Novelty: ClaimNovelty.CONFIRMATORY. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To measure the ratio of decay rates for the K_S meson decaying into different pion final states.

March 5, 2026Open Access

Measurement of Gamma Γ(KS→π+ π- (γ))/Γ(KS→π0 π 0)

Puntos clave

To measure the ratio of decay rates for the K_S meson decaying into different pion final states.
Utilized the KLOE detector at the DAFNE e+e- collider
Analyzed over 10^6 two-pion decays of tagged K_S mesons
Computed statistical error of 0.1% and estimated systematic uncertainties from data.
Measured ratio R = 2.236 ± 0.003 (stat) ± 0.015 (syst)
Statistical error is very low due to large sample size
Systematic uncertainties remain the primary limitation in accuracy.

Resumen

We have measured the ratio Rsπ= Γ (KS→π+ π- (γ) ) /Γ (KS→π0 π 0) with the KLOE detector at the DAFNE e+e- collider. This measurement is fully inclusive with respect to the pi+pi-gamma final state. The sample of over 10⁶ two-pion decays of tagged Ks mesons allows a statistical error as low as 0. 1% to be obtained. The accuracy is limited by systematic uncertainties, which are estimated primarily from data. We find R=2. 236 +/- 0. 003 (stat) +/- 0. 015 (syst).

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Cite This Study

A. et al. (Mon,) studied this question.

synapsesocial.com/papers/69a91e2cd6127c7a504c1da6 https://doi.org/https://doi.org/10.15161/oar.it/8vkyw-gj760

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