SLC Primary Vertex Position
ZCHKDAY
This stage runs ZXFIND on all the PASS2 output events for a given day.
It looks at the primary vertex position, gamma conversions and K-shorts,
and track muliplicities and VXD linking efficiency. Default parameters
are used in ZXFIND.
Output diagnostics from this stage include statistics
files
( example ) :
-
IP positions should be within errors of previous days' values.
-
Ratio of gamma conversions at VXD vs CDC inner wall should be around 2.
-
Should be about 0.15 gamma conversions/Z
-
Should be about 0.20 V/Z
-
The V mass should be with errors of 0.498 and width around 6 MeV.
-
The total track multiplicity should be around 18. VXD inefficiency around
4%.
And Histograms
-
Plots XPRI, YPRI and ZPRI should be single peaked gaussians. Plots XPLN,
YPLN and ZPLN should show no time dependence.
-
Plots VEP, VECT and VEPH should show no areas of inefficiency.
-
Peruse the other plots to see if they match your physics intuition.
creates a table of links from which you can browse statistics and histogram
files from the previous day's ZCHKDAY job.