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Stdhep files for an Ecm=500 GeV SM data sample assuming a 120 GeV Higgs mass are
available at ftp://ftp-lcd.slac.stanford.edu/ilc/ILC500/StandardModel/ .
There are 487,603,537 events (250 fb -1 luminosity) with -80% electron/ +30% positron polarization,
and 474,837,805 events (250 fb -1 luminosity) with +80% electron/ -30% positron polarization.
The WHIZARD Monte Carlo version 1.40 is used for parton generation. The Makefile and build log files for
this implementation of WHIZARD can be found in ftp://ftp-lcd.slac.stanford.edu/ilc/ILC500/StandardModel/whizard-v1r4p0
. These
files are built from a 2000 fb -1 equivalent lumi SM data sample which can be accessed via the directory
ftp://ftp-lcd.slac.stanford.edu/ilc/whizdata/ILC500/ .
Event Weight
Due to the presence of some high cross section processes the events are not completely unweighted.
The event weight must therefore always be considered when analyzing events.
This weight is stored in the variable EVENTWEIGHTLH in the stdhep common block HEPEV4.
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The massless assumption for the first and second fermion generations can produce some odd results given the kinematic cut values we have chosen. For example, the cross section for gamma gamma -> tau tau is significantly larger than the cross section for gamma gamma -> mu mu since the cut value of 4 GeV for default_mass_cut and default_q_cut is much larger than the tau mass.
Also the cross section for gamma gamma -> qq is suppressed relative to the corresponding cross section for lepton pair
production because the cut value of 10 GeV for default_jet_cut is larger than the cut value of 4 GeV for default_mass_cut .
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Additional Ecm=500 GeV Samples
You can build your own subsample of the full 2 ab-1 SM by filling out an input card file suc
FAQ
Whizard has no gluon emission by default, leading to potentially incorrect multiplicity distributions.
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