NON-STANDARD HIGGS BOSON AND THE DECAY KL→π0l+l−

Abstract
We investigate various mechanisms of enhancement of the branching ratios of the decay KL→π0l+l as compared to the predictions of the Standard Model. We propose a model with several Higgs doublets, which contains a Higgs boson with nearly equal couplings to e+e and µ+µ pairs. In this model, the branching ratio BR (KL→π0e+e, π0µ+µ) can be close to the present experimental upper bounds.

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