The Gronau-London-Wyler (GLW) method (M. Gronau, D. Wyler, Phys. Rev. Lett. B {\bf 253} (1991) 483; M. Gronau, D. London, Phys. Rev. Lett. B {\bf 265} (1991) 172) is based on the reconstruction of the
decay to
, where
and
decay
to
-even or
-odd eigenstates. The
modes normally used are:
For the normalization,
, with
is also reconstructed.
The four observables for this method are formed in the following
way:
This set can provide an information on
,
, and
with an 8-fold ambiguity for the phases.