L3TCFTVertex takes as input a tracking tool and calculates the z position of the vertex.
L3TXYVertex takes this z position and the average beam spot position and calculates the full 3-d vertex.
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L3TXYVertex requires 6 parameters as input - mean beam postion in x and y, beam tilt in xz and yz and beam size in x and y. At present the beam size is set at 30 microns in x and y. Online, it gets the other parameters from vertex_analyze at the beginning of the run. In MC the beamspot is at (0,0) with no tilt - these are the default values in the tool. When running on data you will need to find the beam parameters used for that run.
You need to go to d0db.fnal.gov/run/otherQueries.html
Go to "Run Coor Database Query" (at the bottom right)
Fill in the run number, use "l3_beam_pos" as detector, and leave everything else blank.
Hit the "Run" button to get the DB values
To get L3TXYVertex to pick up these values, include a text file named "beamspot.dat" in the test area or trigsim directory, with this format:
beam x
beam y
0.003
0.003
tilt xz
tilt yz
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Below is the current set of plots for the certification of p16 - I will update these as certification progresses .
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