Code is at: /star/data05/scratch/rjreed/PPV2008Eval/VertexJan/

Run in stardev with options:

root4star -b -q 'bfc.C(1,200000,"DbV20080820 pp2008 ITTF OSpaceZ2 OGridLeak3D beamLine VFPPVnoCTB debug logger","st_fmsslow_9060086_raw_1090001.daq")

log file is titled "log.txt"

Changes are:

* now 12 Endcap eta rings are used (were only outer 8)
* PPV finds all possible vertices until it runs out of tracks.
  Those with less than 2 matched tracks  (default threshold) will have 
its likelihood decremented by 1e6, which will cause sufficient ranking 
gap between good and pileup vertices that re-fit will first serve good 
vertices  , next will try to match pileup vertices to remaining global 
tracks.
The average # of vertices per event in muDst is now 20-30.
* PPV finds tracks even if none of the tracks were matched.
* lot of QA histos (deactivated in default PPV) is now enabled.

Out of 1271 Events

PPV original had 763 with at least one vertex. (60.0%)

PPV Steroid had 829 (65.2%) but only 765 where the rank 0 vertex had a postive rank (60.2%)

PPV original had 175 events with both a vpd and PPV vertex

152 matched (within 20 cm) (86.9%)

Of the 23 that did not match, 8 had more than 1 vertex and 4 of these had the second vertex match the vpd vertex.

PPV steroid had 192 events with both vpd and ppv

156 matched (81.3%) 3 of these matching vertices had a negative rank

Of the 36 that did not match, 13 had a negative rank and 25 had more than one vertex.  Of these, 7 had the second vertex match the vpd (and 3 of these had negative rank.  Interestingly the rank 0 vertex in these 3 cases was also negative).

QA plots can be found at:

/star/data05/scratch/rjreed/PPV2008Eval/VertexJan/st_fmsslow_9060086_raw_1090001.ppv.hist.root

Figure 1: PPV on steroids distribution of rank 0 vertices with negative ranking

Figure 2: Comparison between ranking of 0 ranked vertex for PPV on steroids and original

Figure 3: Comparison of # of vertices per event

Figure 4: PPV on steroids delta eta in BEMC

Figure 5: PPV on steroids delta phi in BEMC

Figure 6: PPV on steroids delta eta in EEMC (I don't know what happened)

Figure 7: PPV on steroids delta phi in EEMC