The validation sample is provided by the offline calibration validation
group
in the form of
Standard Ntuple. We run a module that selects good electrons
above certain Et well
above the threshold.
For EMTiming system we take
electrons from W sample, and plot time of arrival
for CEM and PEM. The distributions should be centered at zero
with RMS ~1.6 ns.
If there are two electrons in
the system that are consistent with Z mass- then the time
of arrival difference is plotted. The result should be centered at zero
with the resolution
approximately ~1 ns. For PEM one of the electrons can be from central
detector, so
the mean position might not be zero if there is a small offset for both
systems.
The histograms for
CHA, PHA, and WHA will be added in due time. We are planning
to use muons from the W or J/Psi sample.
