Amplitudes of final six-body process are produced by the GRACE system. In order to reduce a number of unnecessary diagrams, we prepared very restricted model file as;
,
.
Cross sections are calculated based on an amplitude of graph 6
with exact six-body kinematics.
For this method, the width of each intermediate particle had to be set
carefully. In this report, the width of 
is set to
be a partial width of 
via 
.
Other contributions of
via 
,
,
, and
are ignored.
A total width of is calculated to be 
GeV when slepton masses are 1TeV.
A width of 
is set to be a total width of
'.
A pair of f f' comes from W boson decay,
then a branching ratio
of 
must be
1/9.
A width of W boson
is large compared with a Q-value of
a 
decay.
The decay width of
is calculated to be 
GeV, which is 13% smaller than
the width of
.
The effect of virtuality of a W boson cannot be neglected in the
total width calculations.
Total cross sections with/without the proton structure-function are summarized in Table 1. Distributions obtained with the HMRS(E) structure function are shown in Figs.7-8.