![](eff_vs_dr.gif)
Plots showing the vertex finding efficiency vs. the transverse
position of the vertex. The first two plots show the number of
counts (on two different scales of transverse position) total (the
red histograms labeled
"all") and the the number of counts for which the correct vertex
was found (the blue histograms labeled "good").
The third plot on the page shows the
efficiency ("good" divided by "all") for finding the vertex.
The calculations
are done with a combination of the
pisa and pisorp which are part of the
Phenix detector's
simulation package.
John Sullivan: MVD collaboration meeting in March 1997
updated Tue Mar 25, 1997