¥Relies on our capability
to monitor the centroid of a distribution that is 750 ps wide or wider.
¥The raw timing
distribution are vertex dependent and thus need to be corrected for this
dependence (done during DV).
¥This procedure works well
for the T0 counters were we have a no problem with statistics, and path length
corrections (due to vertex variations) are simple to apply.
¥The situation with the
TOF is more complicated for a number of reasons:
¥The
path length variations due to vertex variations are hard to correct for using
the raw data.
¥For a
narrow vertex region, the path length will depend on the emission angle and
momentum of the particle (which will widen the distributions).
¥Applying
a narrow vertex cut reduces the available statistics.