Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-05-13
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages, ps figures included, psfig.sty, and here.sty are required. Talk presented by Y. Kiyo at Workshop on ``Fermion Mass an
Scientific paper
We investigate the rare decay processes of the K mesons, K_{L,S} -> \pi^0 \nu \bar{\nu} and K^{+} -> \pi^+ \nu \bar{\nu} in LR model with lepton family number being well conserved. In these processes, scalar operators (\bar{s}d)(\bar{\nu}_{\tau}\nu_{\tau}), 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 $<\pi|\bar{s}d|K>$. It is emphasized that the K_{L} decay process through the scalar operator is not the CP violating mode, so the B(K_L -> \pi^{0} \nu \bar{\nu}) 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.
Kiyo Yuichiro
Morozumi Takuya
Tanimoto Morimitsu
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