Speaker
Prof.
Antonino Pullia
(Universita` di Milano Bicocca and INFN)
Description
The rate for the decay $ K^{0}_{L} \Rightarrow K^{\pm}
e^{\mp}(\overline {\nu}/\nu) $
of (0.0979 $\pm 0.0037 $) $ s^{-1} $ has been calculated in
the hypothesis of the
conserved vector current and , assuming the CP violation very
small , the two
rates for the decay $\overline{ K^{0}_{L}}\Rightarrow K^{-}
e^{+} \nu $ and $
K^{0}_{L} \Rightarrow K^{+} e^{-} \overline {\nu} $ are foreseen
very similar. Such
a decay was never taken into account in the past , due to the
very low phase space
factor yielding a branching ratio for $ K_{L} $ decay BR=
$(0.5071\pm 0.0199)
\times 10^{-8} $. Now , with the very intense $ K $ beams
foreseen at KEK , J-PARC,
BNL , CERN and LNF the observation of this decay seems feasible.
With samples of very
large statistical significance a new measurement of the indirect
CP violation
parameter $\epsilon$ could be done.
Primary author
Prof.
Antonino Pullia
(Universita` di Milano Bicocca and INFN)
