Preliminary measurement of Gamma(Ke2)/Gamma(Km2) at KLOE

Details Preliminary measurement of Gamma(Ke2)/Gamma(Km2) at KLOE Preliminary measurement of Gamma(Ke2)/Gamma(Km2) at KLOE

2007-07-31

arxiv.org/abs/0707.4623v1

PoSKAON:050,2008

Physics

High Energy Physics

High Energy Physics - Experiment

11 pages, 5 figures. Contributed paper for the XXIII International Symposium on Lepton and Photon Interactions at High Energy,

Scientific paper

A preliminary measurement of RK = Gamma(Ke2)/Gamma(Km2) at the KLOE experiment is discussed. The result, RK = (2.55+-0.05+-0.05)x 10^-5, is based on 1.7 fb^-1 of luminosity integrated on the phi-meson peak at the Frascati e^+e^- collider DAFNE, corresponding to ~8000 observed Ke2 events. Perspectives on the methods planned to improve both the statistical and the systematic errors are briefly outlined.

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