ar X iv : h ep - p h / 01 12 16 4 v 3 2 5 Ju n 20 02 Lepton pair decays of the K L meson in the light - front model
نویسنده
چکیده
We analyze KL lepton pair decays of KL → l+l−γ and KL → l+l−l′+l′− (l, l = e, μ) within the framework of the light-front QCD approach (LFQA). With the KL → γγ form factors evaluated in a model with the LFQA, we calculate the decay branching ratios and find out that our results are all consistent with the experimental data. In addition, we study KL → l+l− decays. We point out that our prediction on KL → e+e− is about 20% smaller than that in the ChPT. We also discuss whether one could extract the short-distance physics from KL → μ+μ−. PACS numbers: 13.20.Eb, 12.39.Ki Typeset using REVTEX
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We analyze the KL lepton pair decays of KL → l+l−γ and KL → l+l−l′+l′− (l, l = e, μ) within the framework of the light-front model. With the KL → γγ form factors evaluated in the model, we calculate the decay branching ratios of the modes and we find out that our results are all consistent with the experimental data. In addition, we have a discussion about the KL → l+l− decay. PACS numbers: 13....
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