ar X iv : h ep - p h / 98 05 30 7 v 1 1 3 M ay 1 99 8 Rare Decay of K Meson ∗
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چکیده
We investigate the rare decay processes of the K mesons, K L,S → π 0 ν ¯ ν and K + → π + ν ¯ ν in LR model with lepton family number being well conserved. In these processes, scalar operators (¯ sd)(¯ ν τ ν τ), which are derived from box diagram in LR model, play an important role due to an enhancement factor M K /m s in the matrix element < π|¯ sd|K >. It is emphasized that the K L decay process through the scalar operator is not the CP violating mode, so the B(K L → π 0 ν ¯ ν) remains non-zero even in the CP conserved limit. We present the pion energy spectrum for these processes and discuss the effects of LR model.
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تاریخ انتشار 1998