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For each event in a derived stdhep file the variable IDRUPLH from the common block HEPEV4 is used to identify the process. (See the
description of the IDRUPLH variable in the introduction above.)
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A series of derived stdhep files have been produced which represent all SM process at Ecm=500 GeV. Different final states appear randomly.
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 with +80% electron / -30% positron polarization.
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