[G14_run] Target vertex distribution

[Reinhard Schumacher]

Hi All,
       On Friday morning 3-16-12 we are running with photons on the most 
recent HD target (20b).  I would like to see how the vertex distribution 
for events from this target compares with the previous one.  I recall 
that we had a significant skewing of events to the downstream end of 
that previous target.   We did not resolve the reason for this, but 
speculated that perhaps the target was not uniformly filled.  Thus, 
comparison with the new target will be instructive, especially if the 
vertex distribution is flatter, for example.

     Can we (Patrick?) please cook Run 69062, and could we please run 
our existing analyses (Natalie?, Paul?, Dao?)  on this run to look at, 
in particular, the vertex distribution?

Reinhard

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Reinhard Schumacher         Department of Physics, 5000 Forbes Ave.
Carnegie Mellon University, Pittsburgh, PA 15213, U.S.A.
phone: 412-268-5177         web: www-meg.phys.cmu.edu/~schumach
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