The following data was taken with triggers: bh1-mb (ID 220510),  etot-mb-l2 (ID 7). jpt-mb-l2 (ID 8), and  bh2-mb-slow (ID 220520).  The total number of events in this set was 16351.
 

Figure1 : Delta Vz between PPV Vertex closest to the VPD vertex and the vpd.  PPV ranking was ignored.

Figure 2.  Delta Vz between second closest PPV vertex and vpd vertex.

 Figure 3:  This is figure 1 fitted with an unrestrained gaussian.

Figure 4:  This is Figure 1 and 2 (red) plotted on top of each other with a bin width of 6.3 cm (2 times the sigma fitted in Figure 3.)