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

Preprint

18 April 2006

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-ex/0601025

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%.

Keywords

PRECISE MEASUREMENT
KLOE DETECTOR
DAFNE USING
DATA SAMPLE
PI0PI0
DECAYS
STAT

All Related Versions

Version 1, 2006-01-13, ArXiv
Version 2, 2006-04-18, ArXiv
Published version: The European Physical Journal C, 48 (3), 767.

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