It is desirable that simple algorithms make the kaon tag available to the
trigger at Level 3. This TOF information would be used in association with CTC
reconstructed tracks, especially those associated with secondary vertices. In
practice this technique would have to associate tracks with a primary vertex
position, determine the time of the event (
) from the prompt tracks and
compute the TOF for each particle including those from secondary vertices using
the global 
, their momenta, and path length as measured in the CTC. Knowing
the momentum and the TOF one can estimate the particle mass. Another simple
technique might be to find the relative times of particles associated with a
secondary vertex of a b-jet. Here the overall calibration is not an issue,
just the relative times of arrival of the various particles and their momenta.
It may be possible to combine such measurements with information from new
trigger hardware such as the new CDF track processor (XFT) and secondary vertex
processor (SFT) to obtain tagged kaon information from a secondary vertex at
Level 2. Detailed studies are required to understand what new physics CDF would
gain from such a trigger.