Precise measurement of Gamma(Ks->pi+pi-(gamma))/Gamma(Ks->pi0pi0) with the KLOE detector at DAFNE

Abstract

Using a sample of over 400 million phi->KsKl decays produced during the years 2001 and 2002 at the DAFNE e+e- collider, the ratio R=Gamma(Ks->pi+pi-(g))/Gamma(Ks->pi0pi0) has been measured with the KLOE detector. The result is R=2.2555+-0.0012(stat)+-0.0021(syst-stat)+-0.0050(syst), which is in good agreement with the previously published result based on the KLOE data sample from the year 2000. The average of the KLOE results is R=2.2549+-0.0054, reducing the total error by a factor of three, to 0.25%.

13 pages, 13 figures, submitted to Eur. Phys. J. C

References in corpus (4)

• Measurements of Semileptonic KL Decay Form Factors
• Study of the branching ratio and charge asymmetry for the decay Ks->pi e nu with the KLOE detector
• Measurements of KL Branching Fractions and the CP Violation Parameter |eta+-|
• Monte Carlo simulation for radiative kaon decays

Cited by in corpus (14)

• Physics with the KLOE-2 experiment at the upgraded DA$\varphi$NE
• An evaluation of |Vus| and precise tests of the Standard Model from world data on leptonic and semileptonic kaon decays
• Flavor Physics in the Quark Sector
• Scrutinizing CKM unitarity with a new measurement of the $K_{\mu 3}/K_{\mu 2}$ branching fraction
• Finding the sigma pole by analytic extrapolation of $\pi \pi$ scattering data
• Precision Measurement of KS Meson Lifetime with the KLOE detector
• Search for the K_S -> e+e- decay with the KLOE detector
• Search for the K(S) --> e+e- decay with the KLOE detector at DAFNE
• Reanalysis of pion pion phase shifts from K -> pi pi decays
• Measurement of the branching fraction for the decay $K_S\to \pi \mu \nu$ with the KLOE detector
• Measurement of the absolute branching ratio of the K+ -> pi+ pi0 (gamma) decay with the KLOE detector
• Vus and lepton universality from kaon decays with the KLOE detector
• Measurement of the KS->gg branching ratio using a pure KS beam with the KLOE detector
• Precision test of the SM with Kl2 and Kl3 decays at KLOE