[d2n-analysis-talk] Dependence of shower cluster identification on tracking in original BB code

[Brad Sawatzky]

Sorry I had to vanish today.  (I'm really looking forward to next month
when things should calm down some...)

Anyway, I found a note from our meeting on 01 July 2010 where we saw
that a change in the preshower location in the DB had a big effect on
the shower vs. preshower histogram.  This was later traced to the the
(old) shower class using the projected track information as a factor in
its cluster identification.   (I think Diana recalled this episode just
before I had to go.)

Bottom line is that even in the old Shower code, the "total deposited
energy" information reported by the Shower code can be influenced by the
reconstructed track -- something that needs to be kept in mind.  That
couples the shower energies to the behavior of the tracking code in a
non-trivial way.

-- Brad

-- 
Brad Sawatzky, PhD <brads at jlab.org>  -<>-  Jefferson Lab / Hall C / C111
Ph: 757-269-5947  -<>-  Fax: 757-269-5235  -<>- Pager: brads-page at jlab.org
The most exciting phrase to hear in science, the one that heralds new
  discoveries, is not "Eureka!" but "That's funny..."   -- Isaac Asimov