Question about syntax

Hi,

I have compare the following two computations:
generate p p > e+ e-
output
launch

and
generate p p > Z, Z > e+ e-
output
launch
set cut_decays T

and I have:
for the first code :
INFO: #***************************************************************************
#
# original cross-section: 842.74720112
# scale variation: +16.2% -16.3%
# central scheme variation: + 0% -20.9%
# PDF variation: +3.09% -3.09%
#
# dynamical scheme # 1 : 805.612 +17.1% -17.2% # \sum ET
# dynamical scheme # 2 : 805.612 +17.1% -17.2% # \sum\sqrt{m^2+pt^2}
# dynamical scheme # 3 : 667.008 +20.8% -20.4% # 0.5 \sum\sqrt{m^2+pt^2}
# dynamical scheme # 4 : 842.747 +16.2% -16.3% # \sqrt{\hat s}
#***************************************************************************

for the second code:
#***************************************************************************
#
# original cross-section: 630.510865654
# scale variation: +12.6% -13.5%
# central scheme variation: +1.07e-09% -18.1%
# PDF variation: +3.14% -3.14%
#
# dynamical scheme # 1 : 602.441 +13.5% -14.3% # \sum ET
# dynamical scheme # 2 : 602.441 +13.5% -14.3% # \sum\sqrt{m^2+pt^2}
# dynamical scheme # 3 : 516.222 +16.7% -17.4% # 0.5 \sum\sqrt{m^2+pt^2}
# dynamical scheme # 4 : 630.511 +12.6% -13.5% # \sqrt{\hat s}
#***************************************************************************

The default value for cut_decays was modified from True to False which explains why some version have different value for the cross-section in the second case.

Cheers,

Olivier

PS: If I leave cut_decays on False then I have:
#***************************************************************************
#
# original cross-section: 1420.27396042
# scale variation: +11.4% -12.4%
# central scheme variation: +1.41e-09% -19.8%
# PDF variation: +3.15% -3.15%
#
# dynamical scheme # 1 : 1321.2 +12.8% -13.8% # \sum ET
# dynamical scheme # 2 : 1321.2 +12.8% -13.8% # \sum\sqrt{m^2+pt^2}
# dynamical scheme # 3 : 1139.29 +16% -16.8% # 0.5 \sum\sqrt{m^2+pt^2}
# dynamical scheme # 4 : 1420.27 +11.4% -12.4% # \sqrt{\hat s}
#***************************************************************************