Let's generate some Higgstrahlung events e+e- -> ZH at the 250 GeV ILC. Pythia8 can't do polarized beams, so we'll use MG5_aMC@NLO. First cd to the MG5 directory and open a file called ilc_eetozh.dat. Since our /home directory is almost fulll, let's make a symbolic link to the fast SSD disk, which has 218G available:

> cd /home/potter/MG5_aMC_v2_6_1
> mkdir /ssd/potter/mg5amc
> ln -s /ssd/potter/mg5amc
> emacs ilc_eetozh.dat &

Now put somethiing like this code in your file:

import model sm
generate e+ e- > z h
output mg5amc/ilc_eetozh
launch
shower=Pythia8
set lpp1 0
set lpp2 0
set ebeam1 125
set ebeam2 125
set nevents 100
set iseed 1

Then run!

> ./bin/mg5_aMC ilc_eetozh.dat

Now copy the .hepmc file to your Delphes directory so we can run anILC detector simulation on it:

> cd mg5amc/ilc_eetozh/Events/run_01
> gunzip  tag_1_pythia8_events.hepmc.gz
> cp tag_1_pythia8_events.hepmc /home/potter/Delphes-3.4.1
> cd /home/potter/Delphes-3.4.1

Thankfully somebody has written a Delphes detector card for SiD using the performance reported in the ILC TDR Volume 4 at https://dsid.hepforge.org/. Follow the directions in the README there and run Delphes using the DSiD card. Browse the events in the Event Display and try to identify the Z decays and the H decays.