[G12] gsim feedback study

[Craig Bookwalter]

  Hi all,
     I've migrated most of the information from these emails to a spot 
on the wiki:

  http://clasweb.jlab.org/rungroups/g12/wiki/index.php/Simulation#Comparison_of_.22generated.22_and_accepted_kinematics

The link points to the latest work, a few plots comparing 
before-and-after momenta and vertex-z from the PART bank. As always, I 
welcome any suggestions.

--cb

Il 07/26/2010 02:53 PM, Craig Bookwalter ha scritto:
> * 5 events where hit-based tracking fails. Two of these events failed
> during the last pass, two are brand-new failures, and one event previously
> had the SCRC clustering problem and now has a HBT problem. I am using the
> RNDM card to seed the random number generator, so these comparisons are
> valid.
> * 2 events where GSIM registers hits in multiple paddles in the TOF
> although the real data has only a single hit (in the SCRC bank, at least).
> These distributed hits have larger times than the real data, resulting in
> bad PID (one pi- to a K-, and one pi- to an antiproton).
> * 2 events where GSIM does not create a hit in the TOF where there ought
> to be one, and thus time-based tracking fails for that track.
> * One event where TBT fails completely and independently of the TOF (this
> event has been lost in all previous passes as well).
> * One event where the SCRC clustering algorithm screws up the time such
> that a good track is assigned a PID of 0.