Vertex Distributions for minbias (MB) and eemc-http-mb-l2gamma (HT) triggered events:

Looking forward to calculating a cross section we will need to make a vertex cut on the HTand MB samples in order to calculate the sampled luminosity.  We will use the BBC to make this cut since MB events don't always reconstruct a TPC vertex.  These distributions should help us determine how best to make this cut.  Right now the cut in Weihong's analysis is |z| < 150 cm, which we would like to approximately reproduce with a cut on the BBC cut.  Here is a sample of the run 6 data and the vertex distributions.

Summary of plots:

DSM vertex -> DSM time difference (Adam used this to only accept the 7, 8, or 9 timebin)

TPC vertex After Cut -> TPC vertex after including only events in DSM timebin 7, 8, or 9

Figure 1: Different plots of vertex info from MB data

Figure 2: Different plots of vertex info from HT data