[Halld-cal] Fwd: forward shower systematics from MC, new timing comparison

[Richard Jones]

I have added a side-by-side comparison of the timing (Fcal only for the
moment) from hdgeant and hdgeant4 to my MC shower systematics study. See
slide 8 in the attached document, posted to docdb. The agreement between
the two simulations is acceptable (30ps difference in the fit p0,
probabably within MC systematics. The primary message of this plot is the
large time-walk that exists in the simulated shower times after all
corrections have been applied. This is the time recorded in REST within the
fcalShower objects.

https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=3852

-Richard Jones
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